With a trick it is possible to install the 8.1 driver under Windows 10. That works really.
(Disable driver signing during installing)
Then a missing vs700.dll must be copied from an older Sonar Version to the current Version to Sonar - and registered (regsvr32.exe) in the System. (...\Cakewalk\Shared Surfaces)
Because cakewalk does not deliver this dll in the current Sonar (license Problem with Roland)
At the Moment I have a working VS700 console.
Currently I'm not missing a function.
No one knows how long it works.