prompt on workspace start up (under Windows > Preferences), doesn't work.
This is a base eclipse function and we haven't seen a problem with it. It may be that you have set the -data option in the myeclipse.ini file (or via a start up command in a script). Please check this (the myeclipse.ini file is in the same folder as the myeclipse executable). If you still see problems, please post on our forums, with details of the release of MyEclipse that you are running and details of the OS that you have. Forums can be found here: https://www.genuitec.com/forums/topics/myeclipse/