If you open a sound in Dimension Pro, they all have the ending .prog
 
But if you look in C:/Program Files/Cakewalk/Dimension Pro/Multisamples, there are no .prog files.
And the files and folder names bear little or no relationship to the names when you get a new sound.
 
Where does Sonar store these .prog files?
Rapture works the same way.
 

Hi. They are located in C:\ProgramData\Cakewalk\Dimension Pro\Programs
All the best.

Yup ... Dimension and Rapture ( be they Pro, LE or otherwise) have similar directory structures / Program-Element-Multisample concepts.
See some further info (e.g, Reg definitions, Directory Structures) in  an earlier post of mine here:
http://forum.cakewalk.com/FindPost/3241098