cubase on start-up issue and mediabay hanging

posted this same question this morning and it has not appeared, i can’t use mediabay without it crashing, cubase randomly quits also, will only start on second boot up. tried clearing the vst folder and preferences still the same. i contacted steinberg for help because i’m at pulling my hair out no reply 2 weeks on. PLEASE HELP ANY SUGGESTIONS? i’m use a mac