I just updated to the latest version of MAMEUI (242) and added a new game to the list.
I always take snaps for the UI but after I created one after editing it there was an issue. When I clicked on the game to run MAMEUI crashed.
I thought it was my OS (Windows 11) but everything else I clicked on worked fine. I thought it was the ROM so I deleted it and clicked on the game and nothing happened. I then thought it was the recently edited image and that was the problem.
Apparently, saving the issue INTERLACED PNG causes MAMEUI to crash. I normally save my non-MAMEUI images interlaced lately and had saved it that way. After I saved my image un-interlaced there was no issue.