Issue #1: If you have used that profile in a recipe before, then you can go to that recipe and click on the disc icon next to the fermentation profile. It will save that profile into your library.
Issue #2: From
http://beersmith.com/faq/ : "Yes, the Basic and Gold licenses let you activate up to two desktop or laptop devices (PC or Mac) with a single license. Platinum and Professional licenses give you 3 and 5 activations respectively. You can manage, renew, add licenses or deactivate devices from your cloud account here."
In order to synchronize your files between the two computers, you will need to either copy the data files from one computer to the other or use the cloud to move recipes back and forth.
