Well, I had to figure that out for myself.

As a software engineer, I find the settings screen somewhat embarassing. No explanation about what each setting is, and the default settings don't work for anything. The previous version I was working with (pre-gui) was slower, but at least it was a setting that could run games. The default gives you a tiny screen and very slow performance. Not good if you are coming in cold.

Also, the help option should send you someplace that actually gives you, well, help. Like the wiki page which actually has a description of what all the options actually do.

That being said, the emulator itself, once properly set up, is pretty damn smooth. It is nice to actually be able to play Fire Emblem with full screen and at full speed. Thanks for all the work.