This is a great update, I love the Game guide feature.
I have found what I guess you could call a bug... a very small one at best....However, I am not sure whether this was in the previous build or not because I normally don't play around with the video settings... but anyway, Whenever I go into the in game menu and set "New Graphics Engine" to "On", upon return to the game the text that pops up says that the New Graphics Engine had been Disabled... Likewise, when I turn the New Graphics Engine Off, the text will say that the new graphics engine was enabled.
Anyhow Great update, This is by far the best emulator... I'm so glad that the best emulator is on my favorite system.... imagine a great Genesis emulator... yuck