FCPX Trial Doesn't Load

[JPTech]

I've downloaded the free trial of FCPX. I have a late-2008 iMac running Lion with 4GB of RAM and a 3.06 GHz Core 2 Duo (so I'm pretty sure I meet the requrements, no?). For some bizarre reason, the app always hangs on "restoring the window layout". Clicking on the app's icon when this happens brings this up:

https://discussions.apple.com/servlet/JiveServlet/showImage/2-16227805-38301/FCPX.jpg

Going into fullscreen half-solves the problem. I can interact with the UI (even import footage!) but the loading screen is STILL there and the UI is definitely glitchy:

https://discussions.apple.com/servlet/JiveServlet/showImage/2-16227805-38302/FCPX2.jpg

I've tried going through the "basic troubleshooting" steps they have, but none of the preference or recepit files mentioned in the document even exist. I updated everything there was to be updated. I've even deleted, re-downloaded, and re-installed it. What the heck is going on?

 

[JPTech]

UPDATE: Neither does iMovie or iDVD...

Okay, I have no idea what is happening to my computer. I just got the hard drive replaced-by my local Apple store-because it was corrupted or whatever. They also installed a new video card (as far as I know) because that wasn't working either. iMovie acts similarly to FCP-the menu bar works fine, as though the app were running normally, but no window appears, and iDVD crashes shortly after opening a project. SOMEBODY HELP ME!!!!! Being a bit of a filmmaker this is a little important...