Things are not fully decided at this point. We will look into it nearer the end and post the information of course.
The changes across everything in the sim are large so likely a full version but any upgrade options will be finalized and released nearer the time.

Regards,

Polovski,
OBD Software, developers of immersive flight sims;
Wings Over Flanders Fields and Wings Over The Reich
http://www.overflandersfields.com
http://www.wingsoverthereich.com