Can I purchase additional Timeslips 2013 licenses?

SOLVED

I just started at my company 1 month ago. They had bought Timeslips 2013 2+ years ago, but never implemented it. It was supposed to be an upgrade from their current 2010. I just finally upgraded it this past week. All went well, but now I realize they had 40 licenses for Timeslips 2010, but only purchased 20 licenses for the upgrade. This mostly should be ok, but is it possible to buy a few more if needed, i.e. if we hire some more people?

Thanks,

David