Go to C//

rogram files/auran/cache and delete the assets.bku file. Then go to the launch screen and select manage content. This should bring up CMP. Next press CTRL+ALT+DEL and go to the processes tab. click on user name to organize the processes. Go down the list and find the one that is named Launcher. Click on this and press the end process button. CMP should have a popup that says rebuilding asset database. Go do something else, it could take a while. Eventually it will either go back to normal, or you will get a messege saying that it has encountered an error and needs to shut down. If you get this message, press don't send, then start cmp back up. It should continue to process the assets for a few more minutes, then go back to working condition.
Hopefully this helps. It is a pain and I have to go through it everytime that i accidentally freeze TRS, but it works.