Well I can see if you just read that announcement, however this what we have a database on the site for.

First, as to big bugs, not to my knolidge. There used to be a "cannot make a visible window modal" bug but that got some fixes in the last version and is being hunted down when it occurs, (read the changelog).

Second, both S5 Secession and Invasion are still being maintained,  although both are pretty much finished versions anyway and the  more recent updates have been things like the S5 Invasion dlc.

Unfortunately, only the smugglers series is accessible thus far. There was a campaign to make empires and dungeons 2 accessible but it fell through, though I don't think the campaign was handled in the best way either.

On the plus side, as I said in the other topic  there is a lot in terms of the smugglers series. S5 Secession is the first game to try and what the demo is of. Invasion is an alternate version to Secession with a different storyline and different factions. There are then the two dlc's, which provide background stories for the games, and then! you can buy the "we love smugglers" bundle for I believe just an additional 5 usd when you buy the game, which will get you smugglers 1, 3 and 4.

two is annoyingly inaccessible due to unlabeled images, and though 4 is essentially a cut down version of 5, 3 and 1 are very different games, (it was s3 that started this hole thing).

Hth.