I’ve never really experienced something like that, so I’m not sure what the issue might be.
Did you install Solar2D in the folder as your old Corona was? In that case, it might be some registry issue. I don’t believe JDK has anything to do with that given how you can run Solar2D without having it installed, right?
If you have re-installed the program to the same folder, then try installing it to a new one. If that wasn’t the issue (or the issue is still persists), then try cleaning your registry from references to Solar2D and Corona.