Scenarist BD doesn't start anymore

[mp3dom]

Hi! I'm asking help here, maybe someone had the same problem in the past and can help me.
I can't get Scenarist BD to start anymore. It means that it doesn't even start the "splashscreen". The process start (looking at task manager) but it goes down almost immediately. It's not a dongle problem since *all* the other applications works as expected. If I remove the dongle, a message that ask for it is displayed, but if I delete the keys (serial#) the program close beforehand, without asking for the new serial. Haven't installed any update or new program. Scenarist simply doesn't seems to work anymore. Is there maybe a way to 'debug' or see why the process goes down without any alert/message/warning even in "Event Viewer"? Thanks.

(Obviously tried to reinstall the program, removing/reinstalling sentinel driver, cleaning the register and so on... but without success)