by Andrei Costescu » Wed Nov 21, 2012 2:41 pm
Window -> Show view -> Other -> Navigator
Do you see the project in there? If you do, delete it from there.
If you don't then have a look on your HDD to see if your project still exists as a folder in the workspace folder. If it does, then you probably didn't check the "delete project contents on disk" when you initially deleted it, so it was only not part of the workspace, but you can't create a new one cause it would overlap with existing folder on disk. In this case you can use File -> Import -> Existing projects into workspace to make it visible in the workspace again, or simply delete it from disk manually if you no longer need it.
If none of the above helps, and you don't have lots of workspace data saved in .metadata that would be a headache to restore, you can backup/delete that entire .metadata folder and then when you start Servoy again do a File -> Import -> Existing projects for all remaining projects (and then restore what else is needed for these remaining projects, like Team -> Share project... and such).
Andrei Costescu
Servoy