first off my sincerest apologies for coming off rude. had a rough night working with a plugin of which that the creator was trying to hack us.
So i did not mean to come off that way towards you. so sorry.
As for the plugin, i tried it a few times. i finally got it to install and activate, once activated if i put a check in anything it would shut off. i finally got to put a check in the optimize css and it shut down again. i disabled all plugins and done it again. nothing just white screen, no error log. I did find an alternative, but could not get your plugin to work in my site