Do you keep changing the basic set up on your computer, for example enabling and disabling your internet connection?

Secondly, I don’t understand the angry face icon next to your midi question.
You don’t understand how to record and edit midi in Cubase. That’s fair enough, but it’s a question for the Cubase user forum, or perhaps the Cubase user manual.
But yes, it is possible to write your own midi drum parts, then quantize them.

Sorry, I’m not a techie.
I’m thinking someone will come along soon and advise you.
Basically the way the authorization works is that it has to authorize your EZdrummer in the computer state you will use it in.
In other words, if you launch and authorize EZdrummer with the internet connection set up, then try to use it with the internet connection disconnected, it wont work.
there is a simple way round it, but I’ve never had to do it, so I’ll leave it to someone else.
If you search the forum you might find a recent thread on the subject.