How to reset/remove the options of a plugin ?

Hello !

I’ve been testing a wordpress plugin in alpha stages, testing each new version of the plugin as it came, and only keeping the stable versions until a new version to test came, however, I have a problem now.

I noticed that the plugin behaves differently, depending on if I use it
– on the blog in which I install every new version of the plugin (quite buggy)
– on a fresh test blog that had not had the plugin before (less buggy)

The plugin is much more buggy on the first blog than on the second, it makes me think that old options are helping break it.

Please, is there a way to simply remove a plugin’s options from a database ? Or are the options scattered everywhere ?
(I’m fluent with phpmyadmin and with database editing, it’s just that I have no knowledge yet when it comes to the plugins and the database)

Thanks a lot if you can tell me ! ??