It's the latest version updatable anyway (not beta) - JV16 X 4.0.9.1514
I have Windows XP, with the last updates Windows XP Service Pack 3 build 2600
It hangs - or just keeps going when you start the Uninstaller. If you don't wait when starting the program for about a minute or so the screen doesn't even show the window. If you wait, then the window comes up, the progress bar moves but hangs (or goes extremely slowly) about 1/4 of the way. Then in about 20 minute I get an error. I sent the bug report. I attached it here too (had to zip it as it wouldn't accept a txt file).
I never noticed this before with the last version (I'm not sure which, but I updated July 20, 2015. I did a registry clean, and that went fine. A speedup startup and that also went fine. Although the sort of sluggishness when starting the program is still there.