Hi,
I am using Master License on 2 PCs with dual boot Windows 7 64bit and Linux (Mint 17 Cinnamon on one, Xubuntu 14 on the other, both 64-bit).
Currently, Linux is secondary OS but I tend to use it more and more, hence the purchase of the Master License.
MC20 was licensed on both OSes.
The problem: suddenly, today, when I tried to start MC20 (under Mint 17), it told me that "The trial period has expired"!!!
I went and restored the license by manually inputting the Registration Code. It accepted it but, when I run the MC20 again, it says the same. And I got the message that my remaining count of restore is 16, (-1 from before).
So, I tried to use the .mjr file, as per your instructions and it says:"Could not restore license from file /home/scas/Downloads/Media Center20 Master-285036.mjr" which is the same message as if you give it the wrong file name or location.
I even tried to open the .mjr file from the folder with "Open with" typing mediacenter20 /RestoreFromFile: it did not complain, but the MC20 still says "The trial period has expired"...