PFF not opening - what do I do to make it work

When I double click on the exe in the folder, up comes the splash screen, but FF itself doesn't open. Can anyone give me some advice to make it work.

I moved it from one folder to another and that could be the problem. I am also using Live Mesh to sync my desktop folder between PS's, if that has a factor. When I click on the "Live Mesh online" link, it opens FF, with no problem.