particular mobile project will not open view mxml, run is blank

I use Flash Builder 4.6 with Air 3.6 updated adb for use with Android 4.2.2. When trying to use a develop a particular application, I encounter all manner of problems. The project contains only one mobile view, and the view will not open correctly in Flash Builder; I get an icon that the application is working, but it keeps spinning for at least 60 minutes. The project no longer runs; it just gives a blank screen.

I have all of this under revision control, and I have run the present code before, though I am not sure with what version of Air. I have tried deleting the files and reimporting them from revision control. I have deleted and reimported the project. I have killed and restarted Flash Builder and rebooted the machine.

I have submitted to get an upgrade of Flash Builder 4.7, but this is highly frustrating. I have no idea where these problems are coming from, and it's very disturbing that Flash Builder won't even open a view (which is just a text file) in the editor. Ideas?