[SOLVED] [CWBRN-32777] Dorchester update sets Sonar as Windows default .mid player

I have opened a trouble report with Cakewalk due to the Dorchester (Platinum in my case) update now wanting to set Sonar as the default player for .mid files.  This has never been a problem before (I've had Sonar since V7) and has only happened with the Dorchester update.  
 
I have a dual boot system with Win 7/8.1.  I installed the Dorchester update in my Win 8.1 installation to see if it was an OS specific issue and it is not, its a Sonar issue.
 
I have the "Win Patrol" program that monitors all system activites and it is reporting the attempted change.
 
Well, I fixed it.  I rolled back to the previous version and then rebooted the PC.  No .mid request from Sonar.  I then reinstalled the Dorchester update.  NO .mid requests.   However, I had to do this on both Win 7 and Win 8.1

Same here, Dorchester did not change my default association. I don't run WinPatrol.

One difference is Bob and I are not using WMP as the default MIDI player. I don't use VLC but do use 3rd party player. I believe the player is being picked up from HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mid\UserChoice key Progid

glad you got it sorted out, tho I'm not sure why that would have solved it.

Its not malware, I run a full Malwarebytes (paid version) scan daily.  I also ran a Antivirus scan and nothing showed up.
 
Being a computer tech, I went deep into the OS, including the registry to look and found nothing there. Win Patrol is a favorite of many techies that I deal with on computer forums. 
 
It had to be something with Sonar.  I was not having the issue until the Dorchester update.  Falling back to the previous version and the problem went away.  Reinstalling the Dorchester and it hasn't done it since (and I've rebooted several times, and run Sonar several times).  Win Patrol runs at startup and is a real-time monitor.