Just downloaded and isntalled 25.2, ran it up and all seems OK. Double-clicked a .vpw and the workspace opened as expected (this is on Windows).
Next, I uninstalled 25.0 via control panel. After that, 25.2 wouldn't start either from the program icon, the start menu or double-clicking the .vpw.
However, 25.1 (which I also have installed) does start just as it always did. And 25.2 will start if I append '+new' to the command line. So on the one hand this looks like uninstalling 25.0 did something, but on the other it didn't affect 25.1 and doesn't prevent multiple instances of 25.2. I suspect there is some process or reference stuck somewhere (I checked that vs.exe wasn't orphaned).
