When you install a UJAM Instruments plugin for the first time, a hardware fingerprint of your computer is created, this is checked as soon as you open up your ujam plug-in in your DAW. The fingerprint is a part of our copy protection.
If you use a USB dongle for your internet connection, your hardware fingerprint will change. In most cases, that is the reason why you have to re-authorize. The only way so far that you not have to re-authorize all the time is to avoid mobile wifi.
Please note that changing something on the hardware like adding more "RAM" or a new "Motherboard" will change the fingerprint and can cause the need to re-authorize every time re-starting your DAW.
I you have any more questions or need further assistance, please submit a request to our support staff. Thanks!