I imported an AS3 project I am currently working on from an existing FDT4.5 workspace into my newly created FDT5 workspace. The wizard started and imported the project correctly, but while I could already see the project in the Flash Explorer view in the background, the import wizard's window would not close, leaving the IDE unusable. Clicking "Finish" again prompted the message " A project named {projectname} already exists!". Clicking "Cancel" caused the cancel button to become inactive, but otherwise wouldn't do anything. And closing the window by clicking the close button in the window bar prompted a message similar to "Could not close the window due to running processes. Cancel first." There was no way out of this, and I had to force quit the IDE. After restarting FDT5, the project appeared successfully imported and there seems to be nothing missing. I would say that makes this is a major inconvenience, but not a critical bug.