I am having this problem too. Upgraded my PC to windows 10, the V Studio 20 is working as audio, but under control surface on the drop down menu, I can't see the v studio options at all, I see Mackie controllers etc. I am wondering, if I should install a previous version of Sonar, like X3, and see if then it will appear in the list? or is there a file out there as you can import a script? any help would be appreciated.