Dear Experts, I'm sorry to bother you with a very silly question but...I'm trying to setup free surfer on my Mac and I'm having problems due to the fact that it keeps giving me errors saying that I don't have a valid license.... I've received the email with the three line license after the download...I've created a .txt file and I moved it to .license in the free surfer directory. What else should I do to make it work?