Best thing you can do, rip it out of your cabinet and throw it in the trash.
Used to have one, until updates and programming got so frustrating, thats exactly what I did. The last update I tried to do froze the device. After several attempts by CS to fix it, they wanted me to send it back to poland on my dime, and it may get fixed, and I may get it back several months down the road.
Lets not forget that any issue you have, they will tell you it's the bluetooth module in whatever device your using, not their point of sale. Yet the bluetooth on several different PC's work just fine with every other bluetooth device, EXCEPT THEIRS!
Biggest point of sale I have ever owned. Save yourself some headaches and just trash it.