Err, sorry to be thick, but I too was delayed by the 'out of serial numbers' message. Now I have the s/n, VKFX shows up in the effects bin but is not activated. At Overloud I'm stumped by:
New activation with License File
Request File (*.olr or *.or2):*
It's got my s/n on display. What else do you have to do?
Under authorisation it says 'Open the plugin or run the Standalone Application. You will be asked for the authorization'. Nada. Going round in circles. Any suggestions welcome!