Is there any error message/code that you get?
Photoshop Elements or Premiere Elements?
No error message -- the icon just bounces as if it is about to open, and then stops with no actual startup. Same on both computers. Same if you go into the Applications folder and click on the app itself. It appears to be about to open, but no longer does so. The Activity Monitor shows no record of that program actually running. I tried repairing disk permissions with Disk Utility in case that had some bearing on things, but no results from that either... Thus, I am stumped.