at First sorry for the double post, just didn't noticed that I had to wait for clearance. As a Catia Greenhorn I was playing with the options and moved to P3 deinstall wouldn't work because this info is stored in:
C:\Users\Finn\AppData\Roaming\DassaultSystemes\CATSettings
Deleting this folder sent catia back to work.
Know knowing that P3 mode let me stuck. I still don't know a solution to directly swich back to P2 cause' there are no possibilities to choose options.
thanks for quick help.