Hi Maxissimo,
Have you tried e-mailing Xavier? He may want to investigate why the yahoogroup has been deleted. Sometimes Yahoo has some peculiar things happening where even the group moderator can't receive new messages. The shutdown also may have been a simple error on Yahoo's part...I noticed Storm and MgModularV Yahoogroups are still operating.
Perhaps email one of the administrators in this Forum and ask if they could restart the Yahoo!group site. They may want complete administrative/moderator control to maintain a company standard. Monsieur Brun may have to approve the restarting, or starting another, CS80V newsgroup, if someone outside of Arturia were to do this.
Ciao,
Tommy