At the bottom of the emulator are a few more options worth noting.Default Settings - Consists of two buttons labeled "Fast" and "Nice" are made for the user who does not want to deal with specifics. "Nice" will default your GPU settings to produce the nicest visuals. "Fast" will default your GPU settings to produce the best compatible speed. Take note that these are default settings and may not be the best settings for your system.
Copy settings to Clipboard - a useful tool that allows you to copy the plugins settings to a text file for reference, or to post at forums for others to help you with proper game settings.
Final OK - Not really an option..but once all settings are complete, simply click the "OK" button.