Workbench crashes on load (1 reply)

this is the error i get when i start workbench:
Unhandled Exception: System.AccessViolationException: Attempted to read or write
protected memory. This is often an indication that other memory is corrupt.
at wb.WBContextUI.init(WBContextUI* , WBFrontendCallbacks* , WBOptions* )
at MySQL.Workbench.WbContext.init(WbFrontendCallbacks callbacks, WbOptions op
tions)
at MySQL.GUI.Workbench.Program.Main(String[] Args)


i successfully installed and used workbench on monday. by tuesday i got this error. i did install some programs on tuesday, including adobe air.

i am running vista and wb 5.2 CE. i have tried uninstalling, reinstalling, rebooting etc.

could anyone help with this? thanks