Thank you for your help.
"When you downloaded 10.1, did anything unusual happen during the process?" : no
"Any error messages?" : no
"Did you download 10,1 on top of 10.9, or did you first trash 10.9?" : on top of 10.0.9
"Did you keep a backup copy of 10.9 (a good idea by the way)?" : no, I have'nt
Have some idea for a solution? Do you think that I will resolve it with the next upgrade?
Is it possible that I already have the 10.1 on works but withot right alert?
How I can see if my FCPX version is 10.1 beyond the info?
Thenk you very much for your help
"About FCP in the FCP menu. What dies it say?" : 10.0.9
"Look in the Applications folder at the root level where the application belongs, what does it say the application is?" : FCPX 10.0.0
"Move the application to the trash and redownload from the App Store" ; I wiil do this soon! Thank you for your help!