I have a trial copy of JBuilder Enterprise Edition installed. I have used it for 4 days. I believe that it hung last night (it was quite late and I don't remember) and I shut the computer down. Now when I start it up, it just hangs, goes no further than asking for my license. I have reinstalled twice, the second time deleting the folder JBuilder5. It still hangs. There is no uninstall.exe so I can't uninstall it. I have gone to Settings >Control panel and tried to remove it. It says that it is not installed.

Do you have any suggestions? If I try now to install JBuilder6, should I do anything first?