Its no problem of mine, I dont have issues with Cleantalk and I am not Airnav and like you I pay for my hardware. Radarbox is compatible but VHF is not but as abcd advises there is a workaround available at this time thanks to his work.
I would have thought having problems with forum access that the first port of call to fix it would be to advise Airnav to see if they could give you some advice or perhaps find a way of letting you through but hey ho as stated its no problem of mine and I will not try to help in the future
Alan