After using the program for a week or so I could not see my presentations anymore. I called tech support and was told to reinstall the program now all my presentations are visible. But now I have a new problem every time I try to quit the program it won't shut down I have to click on the Apple icon and say force quit. I called tech-support again and he took all my logs and said he would have to take them to the developers. Anybody else having this problem and could suggest a fix? Later I tried making brand-new presentation and I was able to close the program down properly and reopen it without a problem. I would still like it to work properly with my old presentation.