Firstly: there is now a (yet small) help for Ares. The help pages can be found directly on this web site.
There are several discussion forums at sourceforge: general discussion,
features,
music / sounds.
There's also a mailing list: aresrpg-users@lists.sourceforge.net (subscription,
archive).
Ares is stable according to my opinion, but there can of course still exist some bugs in the program. If you find one, please report it to me (aresrpg-bugs@lists.sourceforge.net) or enter it into the bug tracker at Sourceforge.