Hi Tobias,
I'll answer here rather than to your email since this might be of interest to all those other people with two or more Certabo boards!!
My driver searches all BT devices looking for the text 'raspb' (regardless of case) in the name. It uses this to build a list of potential BT addresses. It then loops through all those addresses trying to open them and as soon as it succeeds it stops. It's not as efficient as how Lars does it, but I never claimed to be as clever as Lars!
So Dirk's idea should work provided you include the raspb text in the name. So you could name them:
raspb-Fazio (or Fazio RaspberryPi if you prefer)
raspb-Angel
raspb-Curzio
for example. But if you have more than one turned on at a time it's up to Windows which one it detects and opens first.
Of course I don't have two boards to test this with, so let me know if it works!
Thanks,
Graham