Delete user created extension files

I am facing some issues when I try to update a user-created extension from a github repo.

After deleting the folder from: C:\Users\%username%\AppData\Roaming\pyRevit\Extensions

There are still some files from the extension in C:\Users\almei\AppData\Roaming\pyRevit\2024-2025-2026 (installed Revit versions).

Should I also delete those files to update the extension properly?

Deleting the folder in /Extensions is enough to delete the extension. There will be no update as you are deleting the extension. Google would have easily answered this for you.