One piece of advice: only change stuff from automatic settings if you know what you're doing. I'm always afraid to break something.
Note to author: it would be nice if you can temporarily switch into "development mode" or something. Especially since your plugin doesn't seem to like it when you disable it from wp-config. That mode could instantly switch off the cache completely and clear al cache files without losing any settings.
This would be very handy when testing new changes, now you have to go through several steps and make sure you don't forget one.