We fixed a couple of issues for the 1.9 lobby. The database data has not been copied over yet, but the 1.9 lobby is up and should be available for game hosting/joining. Please find a link for the latest 1.9 prerelease version here: http://triplea-game.github.io/download/
Alright, never mind Felix, found most likely the problem you were running into. A bug was introduced very recently while fixing a multiplayer game problem, that was crashing single player games. Both problems are now fixed. The prerelease link on the website has been updated to the latest (v2553)
I've noticed though that it seems another bug was introduced that is effecting how the game closes. It is crashing on close.. Tracking that problem here: http://github.com/triplea-game/triplea/issues/972, with some luck we should have it fixed in the next day or two.
There's a map performance parsing improvement in the pipeline. We also need to figure out how to migrate the lobby database data over. I'm assuming we'll find a problem or two more during this prerelease testing. At this pace though I could imagine the 1.9 release being official in a couple of weeks from now
There are enough difference now, that if you are working with an old version of the code base, things could be ugly. It might be better to open a github issue and post key code snippets. We can discuss next steps then
I'm tempted for us to get some additional features out, but 1.9 has been a long time coming. We really would benefit to get map makers on the updated process, so there is no more limbo there of whether to work on maps in the old source forge system, or the new github backed system. So as soon as we are reasonably confident that the latest 1.9 prerelease is stable, we'll then make the release official. Ideally that testing to make sure it is stable will be happening this week!