And .... Zgoo could not help as there was too much in deep old names again ..., so i took my courage at hand, removed all addons, flushed totally the live folder, did a full download of the game again, and reinstalled one by one the addons, even checking that some of us where not doing the same things
So now, Jovast works fine (well not perfectly as it still does not copy some addons even in the list), and all my old characters deleted are really gone this time. And my vars are not so heavily loaded of wrong informations about them.
I just finished. There is still some incompatibility with MM and Jovast but i deal with it, switching both addons when i need them
Thank you for the big help you gave me and finally push me to finish this :P