I am luck that i've created a BackUp of my website a minute before i had installed this plugin. Upon i've followed the instructions to add useragents the website wend down (Internal server error). I had troubles to uninstall this plugin to because the HTaccesss keeps changing causing to effect the Internal Server error.
After making the htaccess unwritable, manually deleted this plugin i am back on track again.
I am going to make my own mobile solution, because this plugin almost killed my goodrunning website.