title: Flex Builder 4 cant run or debug
body: <p>I've been working in Flash BUilder 4.0. I installed Flash Builder 4.5, and switched to the workspace I had used for 4.0.  Then we were told to go back to 4.0, and now I can't run or debug.  I can build, but then I have to double click on the .html file to run.  Right clicking doesn't bring up run or debug, and the run and debug icons are not in my toolbar.  Any ideas?  I thought I would check if it is something simple before I reinstall.</p>