Re: duplicate files
If you want to continue using SONAR Platinum based plugins that look for the SONAR core, you probably don't want to delete it. If you didn't have any such plugins (Like Rapture or Dimension Pro, or even Z3ta+) then it might be OK. Personally, I like being able to still use Rapture, Dimension Pro and a bunch of other plugins in their FULL versions that came with SPLAT. Cakewalk by BandLab hasn't yet incorporated them, as far as I know.
Sonar Platinum, Windows 7 Pro 64 bit, Intel NUC micro-workstation with 5th Gen Intel i5-5250U, 16 GB RAM and 1.25 TB Storage, Yamaha MG10XU Mixer USB Interface, Yamaha HPH-MT8 Monitor Headphones, Yamaha MX-49 controller synth