Andreas, thanks for your help
Well, I have the MGSTK license installed since always. I will take the routs you mention, may be I can recover something.
Windows 10 automatic updates was the cause, after one updating, several programs were erased automatically by Window from my pc, one of them was Visual Source Safe 5.0, versions of the edp were managed by this program, I tried to restore it from Windows.old dir with no success. So you all be carefully. Backups needs be up to date. :-)
Thanks again.
Jose