I upgraded to Capture 21 can I use it on my desk top and on my laptop when I travel?

I tried to update my free trial to my purchased license on my lap top but I don't see how to do this.  can you send a link or some tutorial to help me. I find Capture One so much harder than Adobe. I can call and talk to a person and everything updates easy. 
Thanks for trying to help lessen my frustration with no support.