Hmm... just tested this by reinstalling my AppTitle skin (which simply sends the VLC window title back to the skin to identify what's being played, via a similar background AHK script executable), and I don't get any error...
https://forum.rainmeter.net/viewtopic.php?t=44673&start=10#p228679
It might just be that your environment is more complex than that. The backup message is because by default when updating the skin, the old version is backed up or moved to the @Backup subfolder from the skins' folder. If you don't want to backup, this can be unticked at skin installation.

https://forum.rainmeter.net/viewtopic.php?t=44673&start=10#p228679
It might just be that your environment is more complex than that. The backup message is because by default when updating the skin, the old version is backed up or moved to the @Backup subfolder from the skins' folder. If you don't want to backup, this can be unticked at skin installation.
Statistics: Posted by Yincognito — 1 minute ago — Replies 1 — Views 34