It'll be out when it's done
or in other words:
I play the current version untill prompted to download a newer version

Imagine what a hassle it would be if upgrades would only come out/would come out sooner if you had to:
a.) update the msg board every 3 seconds for that past 2 months
b.) clog the BBS with posts like "the new version will be out xxx", "I want the new version now!",
"what I want to see in 2.98", "I have only flown a fraction of the planes available in the current version, but I'd like to see more WWI planes in the new version",
"xxx new version xxx xxx xxxxxx!"
Luckily HTC's upgrade-system is kept simple:
play the current version untill prompted to download a newer version