I have a virtual assistant that I would like to help input my fonts into glyphs. I know that I will need to buy another license for her, but is there a way to keep it so that if I get a new VA I can revoke access to the old VA and give access to the new one?
You can install it on her machine if you have remote access. Read this tutorial (actually about something else, but you can use the terminal commands descried in there for your case as well):