We don't have a "general" upgrade policy. It all depends how much work an upgrade requires.
- KORD has been released in 2008, and got a fairly substantial upgrade in 2011, which was FREE
- KJFK had a new version in 2013, which is sold at a VERY favorable discount ( 60% for all users, and 70% to those that bought the old version the same year )
- ALL our other upgrades has always been free so far.
For the next version of KORD, we are doing a complete remake (from scratch) so, if we had to price it accordingly to the work done, we should require a full repurchase but, instead, we'll surely offer some kind of discount.
Nothing is decided about KLAS, but it's more likely to be an heavily discounted upgrade, such as JFK -> JFK V2