I had the same problem, at first, i.e. PP 2014 opened and then the project (very simple, no effects or transitions, just a couple of 'title' overlays on standard footage) just stalled at about 75% of loading.
I switched off the system (after a PP force quit) and left it a few minutes before reboot and everything now seems to be working well and noticeably faster than 'old' CC yesterday on the same project.
I am yet to test the other apps.
I am working on a MacPro 5,1 6 core 3.33GHz, OSX 10.9.3, GTX 680 Mac, 48GB RAM, using Mercury Transmit to MXO2 mini