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.