If you call the Import Dialog (File Menu:Import:Excel) and then you click ‘Cancel’ it is not possible to open the dialog again until Developer is restarted.
I have to rectify: the whole menu system is gone: no menu item works anymore after an import cancel, neither the ‘Quit’ command, only buttons on the solutions still work.
Basically you have to close Developer using the window’s close button and reopen to fix it.
Same thing happens on Servoy client.