Ok i tried disabling the Steinberg-Hub so far so good! I have opened a new project five times without errors.
Gona do some reboots and try a few of my old projects. I´ll let you guys know how this turns out.
Thank you for the tip! 
Ok i tried disabling the Steinberg-Hub so far so good! I have opened a new project five times without errors.
Gona do some reboots and try a few of my old projects. I´ll let you guys know how this turns out.
Thank you for the tip!