I’m using C9 on a desktop running macOS El Capitan 10.11.6 (and do not intend to upgrade macOS on this machine).
I read that C10 Pro requires 10.12.x minimally.
I am interested in acquiring C10P upgrade for my Macbook Pro running Mojave.
Now, would I keep the C9 licence working when plugging the same USB elicenser on desktop then C10 on my laptop, or would it wipe completely C9 ???