Thanks to lawajawa for pointing this out and sharing!
 
This directory/filepath is pretty helpful to know about:
C:\Users\Admin\AppData\Roaming\Cakewalk\    Well, it may not be Admin for other machines.  I guess it's the name of your user account on your machine.
 
The plug-in lists, softsynth lists, etc. and other layouts are available from that directory.
 
Experienced users know to go to that directory and copy and paste the X3 version of our layouts (our accustomed layout) to the similar new Platinum directory to enable them to re-appear, but if you don't know that, you may think you have to rebuild your softsynth or effects lists (the way you like them) again from scratch. But that's not necessary! Just copy as described above and you'll be back to your comfortable environment.

I believe  %AppData%\Cakewalk it will take you to the current user Cakewalk toplevel directory.

Both ways are good to know.

Either way, getting there allows us to grab layouts or other things we may have saved as personal versions and copy those into the current version of Sonar you're setting up.

AppData is a hidden folder in Windows 8.1 pro so be sure to check 'hidden' in File Explorer View or search %appdata%