Process terminated unexpectedly. initial content not found

I have been using Flash Builder 4.6 for awhile and today after running  the application serveral times over 4 hours i get this when I try to run it I get "Launch Failed"  with the following message:

Process terminated unexpectedly.

initial content not found

Launch command details:  "C:\Program Files (x86)\Adobe\Adobe Flash Builder 4.6\sdks\4.6.0\bin\adl.exe" -runtime "C:\Program Files (x86)\Adobe\Adobe Flash Builder 4.6\sdks\4.6.0\runtimes\air\win" -profile mobileDevice -screensize 480x775:480x800 -XscreenDPI 217 -XversionPlatform AND "C:\Users\Kim64\Adobe Flash Builder 4.6\CleanManager\bin-debug\CleanManager-app.xml" "C:\Users\Kim64\Adobe Flash Builder 4.6\CleanManager\bin-debug"

I'm unable to run this application, but I can run other applications in Flash Builder 4.6

Thanks for any help.

Kim