@post@mpm.edu,
If you are coming from osTicket or osTicket Awesome v.1.11 you can simply install osTicket Awesome v1.12.x.
If you are coming from osTicket or osTicket Awesome v.1.10.x, you need to upgrade osTicket itself before you can install osTicket Awesome v.1.12.x.
I hope this is somewhat more clear.
If not, let me what version you are currently running and I will tell you exactly what to do.