Sorry, nothing really new with this version. Just a teeny-tiny bug fix (the GUI correctly identifies the "layer I or layer II" error and informs the user accordingly-- it used to do this correctly, but I unwittingly broke it in version 1.1 and later).
I did, however bring the Help file up to date. Not that that really helps anyone on this forum, since you all know how to use MP3Gain already
But things have settled down in Real Life (new job, new house, no more family members have died this month, etc.), so I'll be making some more updates in the not-too-distant future. This release is kind of a "Hey, I'm still alive!" release.
-Glen