Well, I figured it out. I had to read the release notes which told me I had to:
1. Go to the install directory; drive:\Program Files\Adobe\Flex Builder 3, or the root of the Eclipse install directory if using the Flex Builder Plug in 2. Edit FlexBuilder.ini or Eclipse.ini in a text editor 3. Add the following to the top of the file (not the bottom) -clean 4. Launch Flex Builder or Eclipse 5. Remove –clean after exiting Flex Builder or Eclipse Of course, the first time I did it, I left FlexBuilder.ini open when I tried and nothing changed. Then I did it again after saving and closing the file and VOILA; Everything was back to normal.