Final Cut Pro, doesn't launch after updating to 5.1.4.

Question

Hello there,
I tried opening an older project with the version 5.1. but it only gave me an GENERAL ERROR 41. Then I downloaded the update to 5.1.4. and the application doesn't event want to launch anymore!!
What can I do, what else could've gone wrong. Before the update, I was able to open the program, but now not eve that! The logo jumps on the sidebar, the numbers start running on the opening screen, and then it turns it self off again. I already disconnected and reconnected my scratch disks, restarted the computer several time, etc...what else can I try!
HELP!!

Answer 1

Trash your preferences.
You can use a third party tool to do this, such as the venerable <a href="http"//fcprescue.andersholck.com">FCP Rescue or the more feature rich Preferences Manager ... both are free.
or you can do it yourself
excepted below:
Delete the User Preferences
You can resolve many issues by restoring Final Cut Pro back to its original settings. This will not impact your project files, but you should verify your Scratch Disk location setting after doing this. To reset your Final Cut Pro user preference settings to their original state, do the following:
In the Finder, go to ~/Library/Preferences—the tilde (~) represents your Home folder.
Remove the "com.apple.finalcutpro.plist" file from the Preferences folder.
Remove the "Final Cut Pro User Data" folder from the Preferences folder.