Switching alarm system - can I convert my database?

We are upgrading our commercial alarm & access control system to one sold by another vendor. Our current system has a database consisting of our cardholders, alarm point descriptions, instructions etc. which we'd like to "mine" and copy to our new system.

The software licence seems to restrict us from doing anything but operate our current system. Does anyone know of a situation where this type of data mining has resulted in litigation over infringement of a software licence?
.