Not able to change any settings

I have recently purchased and installed Revy in order to add a Computer repair option to my existing phone repair website, however i am unable to do any setup or customization as not of the select boxes/drop down selection boxes alow me to change anything. It picks up that i am hovering over it but doesn’t allow me to alter anything. Areas are shown in the attached image and it is the same on all settings within the plugin. My iMac and browesers are up to date and i have tried FireFox, Safari and Chrome.