Tried updating to the latest Newburyport version of Platinum through the CCC.  At the very end of the install it gave me a screen saying:
 
C:\program files\cakewalk\shared utilities\cw120 auto.dll
unalbe to register the dll/OCX: RegSvr32  Failed ext code 0x3
 
It recommended abort the install, which I did, I then tried again with the same results.  Then I noticed my Platinum desktop icon was missing.  So I went into the program list to drag it back out.  Only now it's gone from the program list as well.  Not to be found anywhere.  In short, NO SONAR!!
 
Any help will be greatly appreciated.

Is this the new "Roll Back" update (not officially released) we see in the software forum??

That has happened to me twice upgrading. I went to Sonar Support to "correct" some files and it was fixed. They are fast and prompt at support so I suggest you have them look into it. Those guys are great!