[Fixed] Sigil now supports an environment variable eliminating the need to move the directory locally

Well, I see Sigil 0.9.2 is actually listed here as needing an update.

Do note that you can now set the configuration directory of Sigil via the env var "SIGIL_PREFS_DIR".

This is new in 0.9.2, probably a lot better than copying to/from %APPDATA%

[Mod note: This isn't technically a bug, but moving the comment to a post this way allows us to more easily track it.]