I am running the latest release candidate on Ubuntu 14.04. I installed this version to hopefully use the Impress presentations. I had added a song and played with the live view a little to ensure it worked. When I tried to bring up an Impress presentation, the program seized and crashed. When I tried to reopen the application, it now takes over the display of the desktop. My secondary monitor has a white background with the OpenLP logo. The main monitor has OpenLP displayed, but I cannot get anything to respond other than to display the menus (which do not disappear when you navigate to another menu). None of the other applications in Ubuntu appear to function either, though I am able to get the main menu to appear (using CTRL-Esc). It is as if the live view has taken over the desktop and won't let anything else draw to the screen.
Is there a way to reset the default display from the filesystem or do I need to uninstall and re-install?