diff --git a/10-data-transformation.md b/10-data-transformation.md
old mode 100755
new mode 100644
diff --git a/md5sum.txt b/md5sum.txt
index 7e1335ec..30ac50b3 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -19,5 +19,5 @@
 "instructors/instructor-notes.md" "616df143615c98dd1ecf47653a358c3d" "site/built/instructor-notes.md" "2023-05-01"
 "learners/discuss.md" "60c724559d15d89fc50c5418d87f9628" "site/built/discuss.md" "2023-10-20"
 "learners/reference.md" "be4b8a891809c85a625fff879855921a" "site/built/reference.md" "2023-05-01"
-"learners/setup.md" "b80ed6497ce4e24c503d032273f0d1b8" "site/built/setup.md" "2023-06-20"
+"learners/setup.md" "d20bf1277270da7d59f7c580e8a5d74e" "site/built/setup.md" "2023-10-27"
 "profiles/learner-profiles.md" "60b93493cf1da06dfd63255d73854461" "site/built/learner-profiles.md" "2023-05-01"
diff --git a/setup.md b/setup.md
index e6de8f12..a279983e 100644
--- a/setup.md
+++ b/setup.md
@@ -68,7 +68,7 @@ To exit OpenRefine, close all the browser tabs or windows, then navigate to the
 If you encounter problems installing or running OpenRefine, a good source of support is the [OpenRefine mailing list and user forum](https://forum.openrefine.org).
 Include your operating system when searching to find the most relevant answers for your issue, such as threads related to [Windows](https://forum.openrefine.org/search?q=windows), [macOS](https://forum.openrefine.org/search?q=macOS), or [Linux](https://forum.openrefine.org/search?q=linux).
 
-You may also want to check the [Stack Overflow OpenRefine tag](https://stackoverflow.com/questions/tagged/openrefine) or the [OpenRefine Gitter room](https://gitter.im/OpenRefine/OpenRefine).
+You may also want to check the [Stack Overflow OpenRefine tag](https://stackoverflow.com/questions/tagged/openrefine).
 
 There are also general and specialist tutorials about using OpenRefine available on the web, including: