I contacted Microsoft (France) to have can be a luck to have a solution of my problem.
EDIT: No made it me dismissal an automatic message - _ - Erf.. If nobody even developers know how I can find the pleasure to use Paint.net, me feels smells that I go of see using another graphic software = (
But GIMP is too much useless, Photofiltre too much complicated, PS is too dear ...
Edit by Rick: Removed picture full of swearing. User is now banned.
AHHH Je veut mon paint.nettt !