Do I need two licenses for Doba Addon if I have two prestashop manager licenses

Hello and thank you for making such a wonderful product. My question is about how I keep having to re-register the programs on the two computers I use. I was wondering why this keeps happening? I purchased two prestashop manager licenses so technically that issue should never arise. If two doba addon licenses are necessary I will purchase a second one however I wish you would have explained that before I purchased all of my licenses because I purchased these during the 35% off summer deal and would have loved to gotten the same discount on a second doba addon license. Anyway thank you as always for your wonderful software. Your company communication is excellent and admirable so I will always refer you to people so your business can grow.