Hey Sonic.
I switch configurations frequently. The files I backup and restore to do so are:
AUD.ini
ctlrsurface.dat
INSTRMAP.INI
Master.ins
TTSEQ.INI
All are located at C:\Usres\"user name"\Appdata\Roaming\Cakewalk\Sonar Platinum
If you wish to back up folder locations they are located in the registry under the following:
[HKEY_CURRENT_USER\SOFTWARE\Cakewalk Music Software\SONAR\Platinum\UserPaths]
Just export these values from the registry.
EDIT: just noticed in your sig you are running XP. The above folder locations are win 10.