I like to start my Opus sessions with a particular tab group open, with thumbs set at a specific size and the Opus window at a certain size and position
To that end I made a user script about 18 months ago:
Set LISTERSIZE = 2800,1840
Set LISTERPOS = 100,10
Show THUMBNAILSIZE 320
I stored it in the user scripts and have used it successfully ever since - or at least until Windows 10 1903 and/or one of its updates came along.
Now the script does not work at startup, even though my config, of course, is still instructing Opus to use it.
Instead the USB drive I use to store my file backups appears in the root directory. This may be significant as this drive fell foul of the Microsoft bug that can lose the identity of attached USB drives when the 1903 update takes place.
That problem is easily fixed, of course, in Disk Management, but the Opus startup is proving more problematical.
Not the worst problem in the world, but annoying nevertheless. I am using Opus 12.14, by the way.