diff --git a/examples/pipelines/adaptive-rag/app.py b/examples/pipelines/adaptive-rag/app.py
index 1a4599a..8e27a46 100644
--- a/examples/pipelines/adaptive-rag/app.py
+++ b/examples/pipelines/adaptive-rag/app.py
@@ -26,16 +26,12 @@ class App(BaseModel):
     port: int = 8000
 
     with_cache: bool = True
-    cache_backend: InstanceOf[pw.persistence.Backend] = (
-        pw.persistence.Backend.filesystem("./Cache")
-    )
     terminate_on_error: bool = False
 
     def run(self) -> None:
         server = QASummaryRestServer(self.host, self.port, self.question_answerer)
         server.run(
             with_cache=self.with_cache,
-            cache_backend=self.cache_backend,
             terminate_on_error=self.terminate_on_error,
         )
 
diff --git a/examples/pipelines/adaptive-rag/app.yaml b/examples/pipelines/adaptive-rag/app.yaml
index 3380770..abb713b 100644
--- a/examples/pipelines/adaptive-rag/app.yaml
+++ b/examples/pipelines/adaptive-rag/app.yaml
@@ -69,8 +69,6 @@ question_answerer: !pw.xpacks.llm.question_answering.AdaptiveRAGQuestionAnswerer
 
 # Cache configuration
 # with_cache: true
-# cache_backend: !pw.persistence.Backend.filesystem
-#  path: ".Cache"
 
 # Set `terminate_on_error` to true if you want the program to terminate whenever any error is encountered
 # terminate_on_error: false
diff --git a/examples/pipelines/demo-document-indexing/app.py b/examples/pipelines/demo-document-indexing/app.py
index 70ca7a0..c3547e0 100644
--- a/examples/pipelines/demo-document-indexing/app.py
+++ b/examples/pipelines/demo-document-indexing/app.py
@@ -26,16 +26,12 @@ class App(BaseModel):
     port: int = 8000
 
     with_cache: bool = True
-    cache_backend: InstanceOf[pw.persistence.Backend] = (
-        pw.persistence.Backend.filesystem("./Cache")
-    )
     terminate_on_error: bool = False
 
     def run(self) -> None:
         server = DocumentStoreServer(self.host, self.port, self.document_store)
         server.run(
             with_cache=self.with_cache,
-            cache_backend=self.cache_backend,
             terminate_on_error=self.terminate_on_error,
         )
 
diff --git a/examples/pipelines/demo-document-indexing/app.yaml b/examples/pipelines/demo-document-indexing/app.yaml
index 3ac1ba3..17f6816 100644
--- a/examples/pipelines/demo-document-indexing/app.yaml
+++ b/examples/pipelines/demo-document-indexing/app.yaml
@@ -56,8 +56,6 @@ document_store: !pw.xpacks.llm.document_store.DocumentStore
 
 # Cache configuration
 # with_cache: true
-# cache_backend: !pw.persistence.Backend.filesystem
-#  path: ".Cache"
 
 # Set `terminate_on_error` to true if you want the program to terminate whenever any error is encountered
 # terminate_on_error: false
diff --git a/examples/pipelines/demo-question-answering/.env b/examples/pipelines/demo-question-answering/.env
deleted file mode 100644
index 1205005..0000000
--- a/examples/pipelines/demo-question-answering/.env
+++ /dev/null
@@ -1 +0,0 @@
-OPENAI_API_KEY=sk-***
diff --git a/examples/pipelines/demo-question-answering/app.py b/examples/pipelines/demo-question-answering/app.py
index 1a4599a..8e27a46 100644
--- a/examples/pipelines/demo-question-answering/app.py
+++ b/examples/pipelines/demo-question-answering/app.py
@@ -26,16 +26,12 @@ class App(BaseModel):
     port: int = 8000
 
     with_cache: bool = True
-    cache_backend: InstanceOf[pw.persistence.Backend] = (
-        pw.persistence.Backend.filesystem("./Cache")
-    )
     terminate_on_error: bool = False
 
     def run(self) -> None:
         server = QASummaryRestServer(self.host, self.port, self.question_answerer)
         server.run(
             with_cache=self.with_cache,
-            cache_backend=self.cache_backend,
             terminate_on_error=self.terminate_on_error,
         )
 
diff --git a/examples/pipelines/demo-question-answering/app.yaml b/examples/pipelines/demo-question-answering/app.yaml
index 5cbe8a2..39fb915 100644
--- a/examples/pipelines/demo-question-answering/app.yaml
+++ b/examples/pipelines/demo-question-answering/app.yaml
@@ -65,8 +65,6 @@ question_answerer: !pw.xpacks.llm.question_answering.BaseRAGQuestionAnswerer
 
 # Cache configuration
 # with_cache: true
-# cache_backend: !pw.persistence.Backend.filesystem
-#  path: ".Cache"
 
 # Set `terminate_on_error` to true if you want the program to terminate whenever any error is encountered
 # terminate_on_error: false
diff --git a/examples/pipelines/gpt_4o_multimodal_rag/app.py b/examples/pipelines/gpt_4o_multimodal_rag/app.py
index 3550c8c..0433d21 100644
--- a/examples/pipelines/gpt_4o_multimodal_rag/app.py
+++ b/examples/pipelines/gpt_4o_multimodal_rag/app.py
@@ -36,16 +36,12 @@ class App(BaseModel):
     port: int = 8000
 
     with_cache: bool = True
-    cache_backend: InstanceOf[pw.persistence.Backend] = (
-        pw.persistence.Backend.filesystem("./Cache")
-    )
     terminate_on_error: bool = False
 
     def run(self) -> None:
         server = QASummaryRestServer(self.host, self.port, self.question_answerer)
         server.run(
             with_cache=self.with_cache,
-            cache_backend=self.cache_backend,
             terminate_on_error=self.terminate_on_error,
         )
 
diff --git a/examples/pipelines/gpt_4o_multimodal_rag/app.yaml b/examples/pipelines/gpt_4o_multimodal_rag/app.yaml
index a00f1c5..da579dc 100644
--- a/examples/pipelines/gpt_4o_multimodal_rag/app.yaml
+++ b/examples/pipelines/gpt_4o_multimodal_rag/app.yaml
@@ -77,8 +77,6 @@ question_answerer: !pw.xpacks.llm.question_answering.BaseRAGQuestionAnswerer
 
 # Cache configuration
 # with_cache: true
-# cache_backend: !pw.persistence.Backend.filesystem
-#  path: ".Cache"
 
 # Set `terminate_on_error` to true if you want the program to terminate whenever any error is encountered
 # terminate_on_error: false
diff --git a/examples/pipelines/private-rag/app.py b/examples/pipelines/private-rag/app.py
index 1a4599a..8e27a46 100644
--- a/examples/pipelines/private-rag/app.py
+++ b/examples/pipelines/private-rag/app.py
@@ -26,16 +26,12 @@ class App(BaseModel):
     port: int = 8000
 
     with_cache: bool = True
-    cache_backend: InstanceOf[pw.persistence.Backend] = (
-        pw.persistence.Backend.filesystem("./Cache")
-    )
     terminate_on_error: bool = False
 
     def run(self) -> None:
         server = QASummaryRestServer(self.host, self.port, self.question_answerer)
         server.run(
             with_cache=self.with_cache,
-            cache_backend=self.cache_backend,
             terminate_on_error=self.terminate_on_error,
         )
 
diff --git a/examples/pipelines/private-rag/app.yaml b/examples/pipelines/private-rag/app.yaml
index 8cf856a..d664e0b 100644
--- a/examples/pipelines/private-rag/app.yaml
+++ b/examples/pipelines/private-rag/app.yaml
@@ -76,8 +76,6 @@ question_answerer: !pw.xpacks.llm.question_answering.AdaptiveRAGQuestionAnswerer
 
 # Cache configuration
 # with_cache: true
-# cache_backend: !pw.persistence.Backend.filesystem
-#  path: ".Cache"
 
 # Set `terminate_on_error` to true if you want the program to terminate whenever any error is encountered
 # terminate_on_error: false
diff --git a/examples/pipelines/slides_ai_search/app.py b/examples/pipelines/slides_ai_search/app.py
index f29bd64..b23460c 100755
--- a/examples/pipelines/slides_ai_search/app.py
+++ b/examples/pipelines/slides_ai_search/app.py
@@ -13,6 +13,11 @@
 from pathway_slides_ai_search import CustomDeckRetriever, add_slide_id, get_model
 from pydantic import BaseModel, ConfigDict, FilePath, InstanceOf
 
+# To use advanced features with Pathway Scale, get your free license key from
+# https://pathway.com/features and paste it below.
+# To use Pathway Community, comment out the line below.
+pw.set_license_key("demo-license-key-with-telemetry")
+
 
 class App(BaseModel):
     host: str = "0.0.0.0"
@@ -28,9 +33,6 @@ class App(BaseModel):
     details_schema: FilePath | dict[str, Any] | None = None
 
     with_cache: bool = True
-    cache_backend: InstanceOf[pw.persistence.Backend] = (
-        pw.persistence.Backend.filesystem("./Cache")
-    )
     terminate_on_error: bool = False
 
     def run(self) -> None:
@@ -64,7 +66,6 @@ def run(self) -> None:
 
         app.run_server(
             with_cache=self.with_cache,
-            cache_backend=self.cache_backend,
             terminate_on_error=self.terminate_on_error,
         )
 
diff --git a/examples/pipelines/slides_ai_search/app.yaml b/examples/pipelines/slides_ai_search/app.yaml
index 83d946a..2569d20 100644
--- a/examples/pipelines/slides_ai_search/app.yaml
+++ b/examples/pipelines/slides_ai_search/app.yaml
@@ -78,8 +78,6 @@ details_schema:
 
 # Cache configuration
 # with_cache: true
-# cache_backend: !pw.persistence.Backend.filesystem
-#  path: ".Cache"
 
 # Set `terminate_on_error` to true if you want the program to terminate whenever any error is encountered
 # terminate_on_error: false