I just bought premium pro to upgrade my 64 bit OG MM and it wont do anything different, I wanted to export the files as mp3's and it wont let me do it. please help!!! I feel like I just wasted 70$!
The program you install is exactly the same. Once installed you activate and then download and install the additional content for the edition that you bought.
On the initial Splashscreen for the app, on the right hand side, did you enter your email address and the serial number you would have received when you bought the upgrade? Once you have done that, and the app is properly registered to you, there will be quite a lot of additional downloads you will have to do, normally shown in the Downloads tab of the app.