I've just uploaded the new build that adds support for MP3 and FLAC. Copy lame.exe and flac.exe to your main MediaPortal folder just like oggenc.exe. You MUST choose a default directory the first time you run the plugin. This folder will be saved and always used. Your encoder setting is saved also but you can change it with the new button that is added. I tried to keep it very simple but with a couple of more options.