I want to say I have noticed that the .ini files aren't saved in ini folder and they are saved in the MAME folder instead of ini folder you can't change the directories as they are not there either I don't know if it's normal or not as it wasn't there before and all .ini files should go to somewhere else than MAMEUI folder or there aren't any as in arcade264 and HBMAME264
Another bug is when opening MAMEUI options and trying to choose the bilinear filter from the Display Option this will not take any effect you have to go to the mame.ini file and change it manually to take effect this doesn't affect arcade264 and HBMAME264 as they work fine