After upgrading to Mavericks Media Center 18 reverted to trial. Restoring did not work. After contacting JRiver I got an email from Jim saying “Your problem was introduced by Mavericks. It may be fixed in the build that is on the forum. If not, it will be fixed next week.” That was on October 27th. After that I had a 30 day trial period which I could extend for 1 week. In the meantime I sent emails to JRiver. These emails were unanswered. There came no fix. Now today my Mediacenter 18 stopped. I have 1 restore left, which is useless as long that there is no fix. What’s happening now? A fix was promised, emails stayed unanswered??