Eclipse package Loading Problems

I installed eclipse3.3 a few days ago and want to use pydev. Copy several directories of pydev to start eclipse, and no pydev is found. Remember to copy a few directories with 3.2 in the past. It is reasonable to say that 3.3 won't lose such convenient settings. Find the following solution on the Internet:
Http://topic.csdn.net/t/20040713/13/3170307.html

"I have also encountered this problem. You only need to delete the Configuration \ org. Eclipse. Update directory under the directory. "

There are several other solutions, but I think this is the simplest.