I get a "couldn't load seetings, sorry" error when I click on the Configure button on the Plugins Panel.
But the plugin is working great!
Yay!
Edit 1: it works fine when accessed from the conversation window Plus! => Plugins => MPWinamp => Configure...
Edit 2: it seems that after saving the info using the method from Edit 1, it allows me to click on the configure button on the Plugins Panel