By pre-ordering the Field Marshal Edition prior to February 18th, you will be able to access the exclusive pre-order beta which will be running for 48 hours from February 18th to February 20th. Play Panzer Corps 2 before everyone else by pre-ordering the Field Marshal Edition!
According to the description, we should start at 18-00 GMT, but it does not work.

The pre-order beta is ONLY for Steam. You know...

My understanding was that if you pre-ordered through GOG.com, that the pre-release would be available today, February 18th, at COG.com. So what happened? Does anybody know?