It works, but there are a few issues:
1. The compression progress is not displayed, and small windows (like the one I dragged around in the video above) stop appearing when UAGC "hangs," which makes it unclear whether the compression process is running or not (but I don’t know if it was like this before, so I’m writing just in case it used to appear but now doesn’t).
2. After compression, it’s impossible to rename the game folder since it continues to be in use, and you have to close UAGC.
3. UAGC found only 942 .png images and compressed them to over 4GB, which is a lot (and this is with my settings for 40% .png quality), and I can’t understand if this is normal or not.
4. I downloaded the compressed version from Bob, and it turned out to be the same size as my own (to be precise, initially
his compression showed a size of 4311 MB (smaller), and
mine was 4313 MB (larger), but after deleting my compression, the value of 4313 MB appears for Bob's compression; in any case, a 2 MB difference for such a big difference in quality settings can be considered negligible), although I have .png q-ty=40, and he, as far as I know, uses the standard values (50 or 60, I don’t remember what the default is, but definitely higher than mine), which suggests that the .png q-ty setting does not work correctly, if it works at all. And taking the previous point into account, it gives the impression that the .png quality is strictly set at 99 or even 100, while in the original the images are completely uncompressed.