I might, and I emphasize might, be willing to try this one, but I wouldn't have the time required to find all of it on my own.
Some help in finding the source code, or with those value lists would be appreciated. This would, of course, require a list of values and where they would be found in the hex files. The only way to fix it is to find the source code and recompile a new version with the fix, or build an entirely new editor in a code that's more recent. There were updates that broke that control element in the app. The bottom line of the problem is that it's an issue with the Visual Basic library. In earlier versions of windows, this isn't a problem, but if you are on 8 or later, you will be seeing this very soon. Something with the values used for drawing items on the window has been locked out, overridden, or removed or replaced in Windows. Near as I can figure, it has something to do with the redraw on the screen.