Two months of  Premiere Pro - two major Errors that stopped the whole project

I have switched from FCP - and I am quite dissappointed.
Within two months I have experienced two major errors that stopped the whole project. Something like that never happened to me in 15 years of AVID an FCP. -
1. Err msg. "Project contains sequences that cannot be opened" - No way to open the project at all after two weeks of working on it.
2. Err msg. "A Low-level exception occurred in: Adobe Player" - No way to play back the sequence at all. Had to be finnished in FCP.
Apart from that Premiere keeps loosing Render Files and does not recognize my USB-audio-device.
Can anyone help me (tech support) PLEASE?
Am I the only one with problems like that?
- Thinking about switching to MC7.
CS6
OS 10.8.2.
imac 3.1 Ghz corei7
16 GB Ram

You specify "CS6," but do not indicate whether you have patched to the latest. If you haven't please do so.
Any time I hear "crash on launch" (or words to that effect), my first thought is that something in the preferences may be tripping up the app. You can clear the prefs by holding Shift+Option while launching the app--keep the keys pressed until PPRO finishes launching. If you've invested time customizing your prefs and want to be able to revert to them in case they weren't the cause of the problem, then you can manually move or rename them; let us know if you need help finding them.
Other possible culprits, in the order that I recommend proceeding:
If the crash occurs only when you launch directly into a particular project, then naturally that project is most likely the cause.
Drivers, especially for graphics card: update them (on Mac, that means updating OSX)
third party codecs: uninstall them
third party hardware: first update drivers. If that doesn't help, disconnect or disable the hardware

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