As a note I found a way to get the facebook connect to work! With the platform enabled, but registration through facebook disabled, you can get it to work! Making sure you are not logged into VB, click on the facebook connect button, it will as you to enter your facebook account, once done you will be informed that registrations are disabled. Log into your VB account and it will ask you if you want to link your account! Obviously go ahead with the linking and it works. If it doesn't automatically ask just click the connect button again and it should automatically link it.
It worked via my tablet but it should do the same on your pc. I hope it helps in the meantime.