Hello I’m thinking about purchasing the fslabs a321 for msfs I was wondering because I have a sim in college as well as one at home can fslabs be installed on both computers or only on one?

That is something they can support if you contact them but usually it is just a pc and laptop.

As Sabine mentions, its one PC, one laptop and only on request. 

A much easier way - and with Control Center its just a few clicks - is prior to your going to college is to uninstall the product at home which returns the activation whilst leaving your settings and liveries in place.  Once you get to college you can install and use it there.  Returning homr do the reverse - uninstall there and install at home, again in just a few seconds.