Are you using a or a perpetual serial number ?
Launch Premiere Pro CS6 first, enter your serial number if prompted, and then attempt to open Encore. Step 3: Run as Administrator (Windows Only) Are you using a or a perpetual serial number
C:\Program Files (x86)\Common Files\Adobe\SLCache and C:\Program Data\Adobe\SLStore Mac: Library/Application Support/Adobe/SLCache and SLStore enter your serial number if prompted