In the unlikely event that you were given a USB License Dongle, then dongle must be in the computer in order to use the SDK. No configuration of the dongle is needed.
Hi! I'm the primary developer of this project. This paragraph of the documentation is out of date. There is never a need for a dongle, it's all FOSS :)
http://openbiometrics.org/doxygen/latest/installation.html
Anyone read enough to know when that occurs?