Awesome, many thanks. I wish other companies were half as on-to-it as you guys with regards to windows updates.

Thank you @Cakewalk to upgrade Sonar for Windows 10 
 
But i'am working with Steinberg UR28M Audio Interface. I must wait to update from 8.1 to Windows 10 because Steinberg/Yamaha has detected problems by "changing Samplerate". 
https://www.steinberg.net/nc/de/support/knowledgebase_new/show_details/kb_show/product-compatibility-info-regarding-microsoft-windows-10.html
 
...and compatibility with my Roland Synthezisers is unknown at the time
http://www.roland.com/support/support_news/250010
 
I'll be better to wait a few weeks 

Probably a few months I suspect....

I'm not seeing an update available in Command Center.

Never mind I tried the check now button and I can see the updates

I didn't see any updates available in CCC so downloaded it (the Sonar file and the plugin file) from my online account. I installed it manually. By that time CCC said there was an update so I let it repeat the updates and all good.

Weird though that the files were present in my account but CCC did not indicate any were available.

Weird.
CCC does not show an update (im on Foxboro). Go to my account which shows the Gloucester update as well as another for plugins.
I download and install the updates manually OK. Open Sonar and the new update version 21.6.025 Gloucester is showing in the about screen.
I reopen CCC and now it shows Sonar as being yellow and indicates that an update is available. So I let it run again and it only takes a very short time. Update finishes and Sonar shows a Green light and on opening Sonar I'm back to Foxboro.
This is crazy. Whats going on with the CCC.

Something definitely wrong with the CCC. After manually installing the Gloucester update, CCC now shows there's an update but when I ask it to run the update it selects the Foxboro installer for some reason.
In the upper right hand side of the CCC screen it shows the current version 21.6.0.25 and underneath says an update is available

OK. I had to trigger a scan again by the CCC and now it shows as being correctly updated.
 

I did have to log out & back in to the CCC to have the update appear, but it still feels and looks clunky.  However the last thing I want is for CW to spend their time working on.
 
We'll see...