So something happened today. I again got this error today (though I still don’t know what triggered it), but, when I relaunched the program, the program didn’t re-download any packs (unlike before), assessing they were all fine. I worried this was a new bug, but I checked the packs again and they really *were* all good.
So I wonder if the changes to the PSD exporting had an effect on this error. I mean, I still get the message but the program doesn’t seem to be affected by it.