You do need to ensure you have a Pro with the more recent circuitry otherwise you will not be able to do firmware updates.....as I have found. My Pro (purchased from Amazon in April 2015) was evidently one of the pre-August 2014 models where the firmware is stuck and the only way it can be unstuck is to return it to BKool. Mine is currently sunning itself in Majorca for the upgrade!
It's probably not a problem if you are going to stick with BKool software but if you want to use the new ANT+ protocol and other software then you need firmware 3.06.