Why I cannot install grasshopper on rhino5 ?
License legal, service up to date.
Why this happens?
My experience is that some firewalls interfere with the “up-to-date” service, and you can only be 100% sure of being up-to-date by clicking Check Now and seeing the outcome on the web page you are redirected to.
What helped that instead of double clicked installer, I dragged and dropped in rhino and then it worked.
Oh well, what do you know, it worked 
Yeah, both.
Thanks. I’m wondering if it could be something related to, but inverse to https://mcneel.myjetbrains.com/youtrack/issue/RH-40396
I’ll need to check it on Monday.