Windows 10 is indeed a supported OS for Booster. You can also have a look at the supported platforms in here.
In this case, could you please provide us a screenshot of the Booster overview page which shows the OS? Was the Booster reinstalled after upgrading to Windows 10?
I got the same problem when I updated from windows 8.1 to w 10 that the booster is not recognizing windows 10 but keeps showing 8.1 even after reinstalling the booster.
To get more information on this issue, was Booster installed in your Windows 7/8.1 machine before it was upgraded to Win 10? And was Booster showing the OS as Win 8.1 after the upgrade?