The latest Win 10 update Version 1709 OS Build 16299.15 has left my Sonar Platinum unusable. When I try to open it a number of .dll error codes appear and it wont launch the program.

Thank you for the warning.
This windows update is at the moment unofficially.
Have you tried to reinstall SONAR?
I make anyway an automatic backup of the Windows OS all 7 days and have them historicised over two months. So I can return to any previous state. I hope this is not necessary.

There has been a few threads about the dll errors. I always get one about "overloud.dll" is not compatable with this version of windows.  doesn't stop Sonar from opening. 
But if you scroll down thought the last 40 threads here you find a few with this topic. 
 
The solution seems to be to keep a copy of the folder where these dll's are stored and when you get the measage you delete the buggered dll that will show as 0 bytes,  and replace it with the original. 
Seems CCC might be to blame.