This is strange, I haven’t encountered anything like this on any of my systems. I see you’re using Windows 11 - this might be the cause as Stagsi was never tested there. My other bet would be to try an older version (0.74.1712) although I’d be surprised if it matters because we didn’t touch this dialog.
How are you doing the "splitting? There’s no such operation in Stagsi. To “split”, you’d need to create a new database, then use Ctrl+C/Ctrl+V (in Stagsi) from the old database into the new one, then delete copied entries from the old database. This should preserve tags.
If this doesn’t work for some reason, you’d have to copy the entire database folder and manually delete half objects in database A and half in B.
Your video shows how you drag the mouse within the Stagsi window - in this case drop will never work (since you must drag out of Stagsi). You should be able to drag something from Stagsi into Explorer and back. Dropping into another program’s window works only if that program accepts this kind of drag & drop.
Interesting. Our build process is the same as it was 4 years ago except last versions are not signed. That’s probably the reason but we can’t address it now.
Stagsi copies image files inside its database (%appdata%\Soletude\Stagsi\Database\123) unless you use Link mode (when importing) and because there’s no longer any connection to the original image file, dragging takes the copied image. In Link mode, dragging should drag the original image (since there’s no copy). In any case, no temporary folders should be used.
As an alternative to drag & drop, you can customize File Associations so that when you “open” an object (double click or press Enter) you get a dialog where you can pick Paint (or anything else). That will also work either on the file’s copy or original (Link).
No, as everyone has different needs.