Jacob thanks the form of "free" I can not and I can not spend money, I think the problem is that the Adobe must have issued an update with bug and I think it should be their job to fix the program, but now I needed to delivery work that I can no longer open, literally says "the file is in an unknown format and can not be opened"! I do risk losing a week of work.
thanks
paolasalva
sorry for the english but I'm using a translator!