Jim, unless you purchase extra seats, the licence can only be active on one computer at any time - BUT you can very easily swap the activation between computers where the software is installed.
help.alibre.com
If you have current maintenance, you can even use the on-line licensing portal to remotely release activation from the one in the garage, if you forgot to do so before coming into the house.
The enhanced mobility licence automates the licence transfer process BUT it absolutely requires continuous internet access, so is not a good choice for many people
Alibre wants to provide you with choices that help you to make the most of your software. Choose the license style that best fits your business.
www.alibre.com