diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 1f33a47b114..b59a4710719 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -124,7 +124,7 @@ jobs:
         CUDA_PATH: "/usr/local/cuda"
         CUDA_TOOLKIT_ROOT_DIR: "/usr/local/cuda"
         LD_LIBRARY_PATH: "/usr/local/cuda/lib64:/usr/local/cuda/lib64/stubs:$LD_LIBRARY_PATH"
-      run: ${{ github.workspace }}/build.ps1 -UseVCPKG -DoNotUpdateVCPKG -EnableOPENCV -EnableCUDA -EnableCUDNN -DisableInteractive -DoNotUpdateTOOL
+      run: ${{ github.workspace }}/build.ps1 -UseVCPKG -DoNotUpdateVCPKG -EnableOPENCV -EnableCUDA -EnableCUDNN -DisableInteractive -DoNotUpdateTOOL -BuildInstaller
 
     - uses: actions/upload-artifact@v3
       with:
@@ -410,7 +410,7 @@ jobs:
 
     - name: 'Build'
       shell: pwsh
-      run: ${{ github.workspace }}/build.ps1 -UseVCPKG -DoNotUpdateVCPKG -EnableOPENCV -DisableInteractive -DoNotUpdateTOOL
+      run: ${{ github.workspace }}/build.ps1 -UseVCPKG -DoNotUpdateVCPKG -EnableOPENCV -DisableInteractive -DoNotUpdateTOOL -BuildInstaller
 
     - uses: actions/upload-artifact@v3
       with:
@@ -506,7 +506,7 @@ jobs:
 
     - name: 'Build'
       shell: pwsh
-      run: ${{ github.workspace }}/build.ps1 -UseVCPKG -ForceLocalVCPKG -DoNotUpdateVCPKG -EnableOPENCV -DisableInteractive -DoNotUpdateTOOL
+      run: ${{ github.workspace }}/build.ps1 -UseVCPKG -ForceLocalVCPKG -DoNotUpdateVCPKG -EnableOPENCV -DisableInteractive -DoNotUpdateTOOL -BuildInstaller
 
     - uses: actions/upload-artifact@v3
       with:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8587793345a..8766e59524f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,6 +21,7 @@ option(VCPKG_BUILD_OPENCV_WITH_CUDA "Build OpenCV with CUDA extension integratio
 option(VCPKG_USE_OPENCV2 "Use legacy OpenCV 2" OFF)
 option(VCPKG_USE_OPENCV3 "Use legacy OpenCV 3" OFF)
 option(VCPKG_USE_OPENCV4 "Use OpenCV 4" ON)
+option(USE_NSIS "Use NSIS as a CPack backend on Windows" ON)
 
 if(DEFINED ENV{VCPKG_DEFAULT_TRIPLET})
   message(STATUS "Setting default vcpkg target triplet to $ENV{VCPKG_DEFAULT_TRIPLET}")
@@ -667,15 +668,9 @@ install(
 if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/vcpkg.json)
   file(READ ${CMAKE_CURRENT_SOURCE_DIR}/vcpkg.json VCPKG_JSON_STRING)
   string(JSON CPACK_PACKAGE_NAME GET ${VCPKG_JSON_STRING} name)
-  string(JSON CPACK_BUNDLE_NAME GET ${VCPKG_JSON_STRING} name)
   string(JSON CPACK_PACKAGE_HOMEPAGE_URL GET ${VCPKG_JSON_STRING} homepage)
   string(JSON CPACK_PACKAGE_DESCRIPTION GET ${VCPKG_JSON_STRING} description)
-  string(JSON CPACK_NSIS_DISPLAY_NAME GET ${VCPKG_JSON_STRING} description)
-  string(JSON CPACK_NSIS_PACKAGE_NAME GET ${VCPKG_JSON_STRING} description)
   set(CPACK_RESOURCE_FILE_LICENSE ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE)
-  set(CPACK_NSIS_MUI_ICON "${CMAKE_CURRENT_SOURCE_DIR}/src/darknet.ico")
-  set(CPACK_NSIS_MUI_UNIICON "${CMAKE_CURRENT_SOURCE_DIR}/src/darknet.ico")
-  set(CPACK_BUNDLE_UNIICON "${CMAKE_CURRENT_SOURCE_DIR}/src/darknet.ico")
 
   if(UNIX AND NOT APPLE)
     find_program(LSB_RELEASE_EXEC lsb_release)
@@ -685,14 +680,26 @@ if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/vcpkg.json)
     )
     if(LSB_RELEASE_ID_SHORT STREQUAL "Ubuntu")
       set(CPACK_GENERATOR "DEB")
+      set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Darknet")
     else()
       set(CPACK_GENERATOR "RPM")
     endif()
+  elseif(APPLE)
+      set(CPACK_GENERATOR "DragNDrop")
   elseif(WIN32)
     set(CPACK_PACKAGE_INSTALL_DIRECTORY ${CPACK_PACKAGE_NAME})
-    set(CPACK_NSIS_MODIFY_PATH "ON")
-    set(CPACK_NSIS_ENABLE_UNINSTALL_BEFORE_INSTALL "ON")
-    set(CPACK_GENERATOR "NSIS")
+    if(USE_NSIS)
+      set(CPACK_GENERATOR "NSIS")
+      string(JSON CPACK_NSIS_PACKAGE_NAME GET ${VCPKG_JSON_STRING} name)
+      string(JSON CPACK_NSIS_DISPLAY_NAME GET ${VCPKG_JSON_STRING} name)
+      set(CPACK_NSIS_ENABLE_UNINSTALL_BEFORE_INSTALL "ON")
+      set(CPACK_NSIS_MODIFY_PATH OFF) #disable extra page for adding to PATH, because it's broken on Win10+ due to NSIS not supporting MAX_PATH
+      set(CPACK_NSIS_MUI_ICON "${CMAKE_CURRENT_SOURCE_DIR}/src/darknet.ico")
+      set(CPACK_NSIS_MUI_UNIICON "${CMAKE_CURRENT_SOURCE_DIR}/src/darknet.ico")
+    else()
+      set(CPACK_GENERATOR "WIX")
+      #set(CPACK_WIX_UPGRADE_GUID "") # IMPORTANT! It has to be unique for every project!!
+    endif()
   endif()
 
   include(CPack)
diff --git a/README.md b/README.md
index 64a7ff4e150..d9de132a86d 100644
--- a/README.md
+++ b/README.md
@@ -581,6 +581,8 @@ It will create `.txt`-file for each `.jpg`-image-file - in the same directory an
 
 8.1. For training with mAP (mean average precisions) calculation for each 4 Epochs (set `valid=valid.txt` or `train.txt` in `obj.data` file) and run: `darknet.exe detector train data/obj.data yolo-obj.cfg yolov4.conv.137 -map`
 
+8.2. One can also set the `-mAP_epochs` in the training command if less or more frequent mAP calculation is needed. For example in order to calculate mAP for each 2 Epochs run `darknet.exe detector train data/obj.data yolo-obj.cfg yolov4.conv.137 -map -mAP_epochs 2`
+
 9. After training is complete - get result `yolo-obj_final.weights` from path `build\darknet\x64\backup\`
 
    - After each 100 iterations you can stop and later start training from this point. For example, after 2000 iterations you can stop training, and later just start training using: `darknet.exe detector train data/obj.data yolo-obj.cfg backup\yolo-obj_2000.weights`
diff --git a/build.ps1 b/build.ps1
index b9e3205569e..a85fcca7b8b 100755
--- a/build.ps1
+++ b/build.ps1
@@ -6,7 +6,7 @@
         build
         Created By: Stefano Sinigardi
         Created Date: February 18, 2019
-        Last Modified Date: August 31, 2023
+        Last Modified Date: September 10, 2023
 
 .DESCRIPTION
 Build tool using CMake, trying to properly setup the environment around compiler
@@ -193,7 +193,7 @@ param (
 
 $global:DisableInteractive = $DisableInteractive
 
-$build_ps1_version = "3.5.0"
+$build_ps1_version = "3.5.1"
 $script_name = $MyInvocation.MyCommand.Name
 
 Import-Module -Name $PSScriptRoot/scripts/utils.psm1 -Force
@@ -210,9 +210,12 @@ else {
 $BuildLogPath = "$PSCustomScriptRoot/build.log"
 $ReleaseInstallPrefix = "$PSCustomScriptRoot"
 $DebugInstallPrefix = "$PSCustomScriptRoot/debug"
-$DebugBuildSetup = " -DCMAKE_INSTALL_PREFIX=$DebugInstallPrefix -DCMAKE_BUILD_TYPE=Debug"
-$ReleaseBuildSetup = " -DCMAKE_INSTALL_PREFIX=$ReleaseInstallPrefix -DCMAKE_BUILD_TYPE=Release"
-
+$DebugBuildSetup = " -DCMAKE_BUILD_TYPE=Debug "
+$ReleaseBuildSetup = " -DCMAKE_BUILD_TYPE=Release "
+if (-Not $BuildInstaller) {
+  $DebugBuildSetup = $DebugBuildSetup + " -DCMAKE_INSTALL_PREFIX=$DebugInstallPrefix "
+  $ReleaseBuildSetup = $ReleaseBuildSetup + " -DCMAKE_INSTALL_PREFIX=$ReleaseInstallPrefix "
+}
 Start-Transcript -Path $BuildLogPath
 
 Write-Host "Build script version ${build_ps1_version}, utils module version ${utils_psm1_version}"
@@ -819,6 +822,11 @@ if ($ForceVCPKGCacheRemoval -and (-Not $UseVCPKG)) {
   Write-Host "VCPKG is not enabled, so local vcpkg binary cache will not be deleted even if requested" -ForegroundColor Yellow
 }
 
+if ($BuildInstaller) {
+  Write-Host "You requested to build an installer, so enabling this option if supported" -ForegroundColor Yellow
+  $AdditionalBuildSetup = $AdditionalBuildSetup + " -DENABLE_INSTALLER=ON"
+}
+
 if (($ForceOpenCVVersion -eq 2) -and $UseVCPKG) {
   Write-Host "You requested OpenCV version 2, so vcpkg will install that version" -ForegroundColor Yellow
   Write-Host "This requires using vcpkg.json.opencv23 as manifest file" -ForegroundColor Yellow
@@ -1012,7 +1020,12 @@ else {
     MyThrow("Config failed! Exited with error code $exitCode.")
   }
   Write-Host "Building release CMake project" -ForegroundColor Green
-  $proc = Start-Process -NoNewWindow -PassThru -FilePath $CMAKE_EXE -ArgumentList "--build . ${releaseConfig} --parallel ${NumberOfBuildWorkers} --target install"
+  if ($BuildInstaller) {
+    $proc = Start-Process -NoNewWindow -PassThru -FilePath $CMAKE_EXE -ArgumentList "--build . ${releaseConfig} --parallel ${NumberOfBuildWorkers}"
+  }
+  else {
+    $proc = Start-Process -NoNewWindow -PassThru -FilePath $CMAKE_EXE -ArgumentList "--build . ${releaseConfig} --parallel ${NumberOfBuildWorkers} --target install"
+  }
   $handle = $proc.Handle
   $proc.WaitForExit()
   $exitCode = $proc.ExitCode
diff --git a/include/darknet.h b/include/darknet.h
index d82cda2841a..55ab50d5da8 100644
--- a/include/darknet.h
+++ b/include/darknet.h
@@ -1052,7 +1052,7 @@ LIB_API void reset_rnn(network *net);
 LIB_API float *network_predict_image(network *net, image im);
 LIB_API float *network_predict_image_letterbox(network *net, image im);
 LIB_API float validate_detector_map(char *datacfg, char *cfgfile, char *weightfile, float thresh_calc_avg_iou, const float iou_thresh, const int map_points, int letter_box, network *existing_net);
-LIB_API void train_detector(char *datacfg, char *cfgfile, char *weightfile, int *gpus, int ngpus, int clear, int dont_show, int calc_map, float thresh, float iou_thresh, int mjpeg_port, int show_imgs, int benchmark_layers, char* chart_path);
+LIB_API void train_detector(char *datacfg, char *cfgfile, char *weightfile, int *gpus, int ngpus, int clear, int dont_show, int calc_map, float thresh, float iou_thresh, int mjpeg_port, int show_imgs, int benchmark_layers, char* chart_path, int mAP_epochs);
 LIB_API void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filename, float thresh,
     float hier_thresh, int dont_show, int ext_output, int save_labels, char *outfile, int letter_box, int benchmark_layers);
 LIB_API int network_width(network *net);
diff --git a/src/coco.c b/src/coco.c
index ec49ae013d3..1ccb3bc8b63 100644
--- a/src/coco.c
+++ b/src/coco.c
@@ -374,10 +374,9 @@ void test_coco(char *cfgfile, char *weightfile, char *filename, float thresh)
         show_image(im, "predictions");
         free_image(im);
         free_image(sized);
-
+        free_alphabet(alphabet);
         wait_until_press_key_cv();
         destroy_all_windows_cv();
-
         if (filename) break;
     }
     free(boxes);
diff --git a/src/data.c b/src/data.c
index 7d2a4659906..17b675cc667 100644
--- a/src/data.c
+++ b/src/data.c
@@ -1238,6 +1238,15 @@ data load_data_detection(int n, char **paths, int m, int w, int h, int c, int bo
             int swidth = ow - pleft - pright;
             int sheight = oh - ptop - pbot;
 
+            if (swidth <=  0 || sheight <= 0 || (ow - pleft) <= 0 || (oh - ptop) <= 0 ) {
+                printf("\n WARNING: invalid resize. Resetting swidth: %d , sheight:  %d, pleft: %d, ptop: %d \n", dw, dh, 0 ,0);
+                printf("\n Original values: \n swidth = %d, sheight = %d, pleft = %d, pright = %d, ptop = %d, pbot = %d, ow = %d, oh = %d \n", swidth, sheight, pleft, pright, ptop, pbot, ow, oh);
+                swidth = ow;
+                sheight = oh;
+                pleft = 0;
+                ptop = 0;
+            }
+
             float sx = (float)swidth / ow;
             float sy = (float)sheight / oh;
 
diff --git a/src/demo.c b/src/demo.c
index e9017a0bd8c..7a258f3e70f 100644
--- a/src/demo.c
+++ b/src/demo.c
@@ -413,14 +413,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
 
     free_ptrs((void **)names, net.layers[net.n - 1].classes);
 
-    const int nsize = 8;
-    for (j = 0; j < nsize; ++j) {
-        for (i = 32; i < 127; ++i) {
-            free_image(alphabet[j][i]);
-        }
-        free(alphabet[j]);
-    }
-    free(alphabet);
+    free_alphabet(alphabet);
     free_network(net);
     //cudaProfilerStop();
 }
diff --git a/src/detector.c b/src/detector.c
index 3799063187b..5171ee86a49 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -23,7 +23,7 @@ int check_mistakes = 0;
 
 static int coco_ids[] = { 1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,24,25,27,28,31,32,33,34,35,36,37,38,39,40,41,42,43,44,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,67,70,72,73,74,75,76,77,78,79,80,81,82,84,85,86,87,88,89,90 };
 
-void train_detector(char *datacfg, char *cfgfile, char *weightfile, int *gpus, int ngpus, int clear, int dont_show, int calc_map, float thresh, float iou_thresh, int mjpeg_port, int show_imgs, int benchmark_layers, char* chart_path)
+void train_detector(char *datacfg, char *cfgfile, char *weightfile, int *gpus, int ngpus, int clear, int dont_show, int calc_map, float thresh, float iou_thresh, int mjpeg_port, int show_imgs, int benchmark_layers, char* chart_path, int mAP_epochs)
 {
     list *options = read_data_cfg(datacfg);
     char *train_images = option_find_str(options, "train", "data/train.txt");
@@ -304,7 +304,7 @@ void train_detector(char *datacfg, char *cfgfile, char *weightfile, int *gpus, i
         const int iteration = get_current_iteration(net);
         //i = get_current_batch(net);
 
-        int calc_map_for_each = 4 * train_images_num / (net.batch * net.subdivisions);  // calculate mAP for each 4 Epochs
+        int calc_map_for_each = mAP_epochs * train_images_num / (net.batch * net.subdivisions);  // calculate mAP every mAP_epochs
         calc_map_for_each = fmax(calc_map_for_each, 100);
         int next_map_calc = iter_map + calc_map_for_each;
         next_map_calc = fmax(next_map_calc, net.burn_in);
@@ -1778,17 +1778,7 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
     free_ptrs((void**)names, net.layers[net.n - 1].classes);
     free_list_contents_kvp(options);
     free_list(options);
-
-    int i;
-    const int nsize = 8;
-    for (j = 0; j < nsize; ++j) {
-        for (i = 32; i < 127; ++i) {
-            free_image(alphabet[j][i]);
-        }
-        free(alphabet[j]);
-    }
-    free(alphabet);
-
+    free_alphabet(alphabet);
     free_network(net);
 }
 
@@ -2000,6 +1990,8 @@ void run_detector(int argc, char **argv)
     int ext_output = find_arg(argc, argv, "-ext_output");
     int save_labels = find_arg(argc, argv, "-save_labels");
     char* chart_path = find_char_arg(argc, argv, "-chart", 0);
+    // While training, decide after how many epochs mAP will be calculated. Default value is 4 which means the mAP will be calculated after each 4 epochs
+    int mAP_epochs = find_int_arg(argc, argv, "-mAP_epochs", 4);
     if (argc < 4) {
         fprintf(stderr, "usage: %s %s [train/test/valid/demo/map] [data] [cfg] [weights (optional)]\n", argv[0], argv[1]);
         return;
@@ -2038,7 +2030,7 @@ void run_detector(int argc, char **argv)
             if (weights[strlen(weights) - 1] == 0x0d) weights[strlen(weights) - 1] = 0;
     char *filename = (argc > 6) ? argv[6] : 0;
     if (0 == strcmp(argv[2], "test")) test_detector(datacfg, cfg, weights, filename, thresh, hier_thresh, dont_show, ext_output, save_labels, outfile, letter_box, benchmark_layers);
-    else if (0 == strcmp(argv[2], "train")) train_detector(datacfg, cfg, weights, gpus, ngpus, clear, dont_show, calc_map, thresh, iou_thresh, mjpeg_port, show_imgs, benchmark_layers, chart_path);
+    else if (0 == strcmp(argv[2], "train")) train_detector(datacfg, cfg, weights, gpus, ngpus, clear, dont_show, calc_map, thresh, iou_thresh, mjpeg_port, show_imgs, benchmark_layers, chart_path, mAP_epochs);
     else if (0 == strcmp(argv[2], "valid")) validate_detector(datacfg, cfg, weights, outfile);
     else if (0 == strcmp(argv[2], "recall")) validate_detector_recall(datacfg, cfg, weights);
     else if (0 == strcmp(argv[2], "map")) validate_detector_map(datacfg, cfg, weights, thresh, iou_thresh, map_points, letter_box, NULL);
diff --git a/src/image.c b/src/image.c
index ca9f26651eb..3775837b2b4 100644
--- a/src/image.c
+++ b/src/image.c
@@ -280,6 +280,19 @@ image **load_alphabet()
     return alphabets;
 }
 
+void free_alphabet(image **alphabet)
+{
+    int i, j;
+    const int nsize = 8;
+    for (j = 0; j < nsize; ++j) {
+        for (i = 32; i < 127; ++i) {
+            free_image(alphabet[j][i]);
+        }
+        free(alphabet[j]);
+    }
+    free(alphabet);
+}
+
 
 
 // Creates array of detections with prob > thresh and fills best_class for them
diff --git a/src/image.h b/src/image.h
index 90e6a04868b..65ccb7c7122 100644
--- a/src/image.h
+++ b/src/image.h
@@ -88,6 +88,7 @@ image load_image(char *filename, int w, int h, int c);
 image load_image_stb_resize(char *filename, int w, int h, int c);
 //LIB_API image load_image_color(char *filename, int w, int h);
 image **load_alphabet();
+void free_alphabet(image **alphabet);
 
 //float get_pixel(image m, int x, int y, int c);
 //float get_pixel_extend(image m, int x, int y, int c);
diff --git a/src/image_opencv.cpp b/src/image_opencv.cpp
index 7ff18bfe862..459d9bf0f37 100644
--- a/src/image_opencv.cpp
+++ b/src/image_opencv.cpp
@@ -1331,8 +1331,8 @@ extern "C" image image_data_augmentation(mat_cv* mat, int w, int h,
         // Mat -> image
         out = mat_to_image(sized);
     }
-    catch (...) {
-        cerr << "OpenCV can't augment image: " << w << " x " << h << " \n";
+    catch (const std::exception& e) {
+        cerr << "OpenCV can't augment image: " << w << " x " << h << " \n" << e.what() << " \n";
         out = mat_to_image(*(cv::Mat*)mat);
     }
     return out;
diff --git a/src/parser.c b/src/parser.c
index 3bf4683d996..16a2b905f7b 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -2006,12 +2006,12 @@ void save_weights_upto(network net, char *filename, int cutoff, int save_ema)
     FILE *fp = fopen(filename, "wb");
     if(!fp) file_error(filename);
 
-    int major = MAJOR_VERSION;
-    int minor = MINOR_VERSION;
-    int revision = PATCH_VERSION;
-    fwrite(&major, sizeof(int), 1, fp);
-    fwrite(&minor, sizeof(int), 1, fp);
-    fwrite(&revision, sizeof(int), 1, fp);
+    int32_t major = MAJOR_VERSION;
+    int32_t minor = MINOR_VERSION;
+    int32_t revision = PATCH_VERSION;
+    fwrite(&major, sizeof(int32_t), 1, fp);
+    fwrite(&minor, sizeof(int32_t), 1, fp);
+    fwrite(&revision, sizeof(int32_t), 1, fp);
     (*net.seen) = get_current_iteration(net) * net.batch * net.subdivisions; // remove this line, when you will save to weights-file both: seen & cur_iteration
     fwrite(net.seen, sizeof(uint64_t), 1, fp);
 
@@ -2267,12 +2267,12 @@ void load_weights_upto(network *net, char *filename, int cutoff)
     FILE *fp = fopen(filename, "rb");
     if(!fp) file_error(filename);
 
-    int major;
-    int minor;
-    int revision;
-    fread(&major, sizeof(int), 1, fp);
-    fread(&minor, sizeof(int), 1, fp);
-    fread(&revision, sizeof(int), 1, fp);
+    int32_t major;
+    int32_t minor;
+    int32_t revision;
+    fread(&major, sizeof(int32_t), 1, fp);
+    fread(&minor, sizeof(int32_t), 1, fp);
+    fread(&revision, sizeof(int32_t), 1, fp);
     if ((major * 10 + minor) >= 2) {
         printf("\n seen 64");
         uint64_t iseen = 0;
diff --git a/src/yolo.c b/src/yolo.c
index f13d460aca0..dfd497dfc80 100644
--- a/src/yolo.c
+++ b/src/yolo.c
@@ -328,11 +328,11 @@ void test_yolo(char *cfgfile, char *weightfile, char *filename, float thresh)
 
         free_image(im);
         free_image(sized);
-
+        free_alphabet(alphabet);
         wait_until_press_key_cv();
         destroy_all_windows_cv();
 
-        if (filename) break;
+      if (filename) break;
     }
     free(boxes);
     for(j = 0; j < l.side*l.side*l.n; ++j) {