Yeah, as goussej says it stopped a few years ago. The website hasnt been updated for a few years and the forum is not as active as it used to be (although there are a few frequent forum users still who are very helpfull). The main developer did release the full source about 1-2 years ago as he was unable to devote his full attention to it.
Personally I still use it (version 0_2_3.jar) as I always found it pretty easy to create simple applet games (i.e see http://www.bullsquared.com
all GTGE apart from the 4K game).