DecoStudio/CorelDraw install breaks Windows 8.1 apps....

Here's one for you...  Got a new Toshiba laptop with Windows 8.1.  Runs great.  Then I installed my DecoStudio 1.5 / CorelDraw 4x package on it.  Those run fine.  But now, all of the new style Windows 8 apps are broken.  Doesn't matter which one I try to run, all that happens is the app's splash screen comes up, goes away, and no app running...  Everything else runs fine.  Any thoughts???

Dave