I too am having this issue and its driving me insane / slightly *quiz* me off.
I can like some have suggested get Alt/ click to work but the time it takes to find that sweet spot, i could have just opened the effect/gone for a Tea/ cured cancer/ comeback and turn it off.
what i have found is sometimes i can get the mouse to hover offer the effect and that cute HUGE off/off circle dosent show up. then i can alt +click to turn the effect off just about anywhere i want in the left half of the effect pane. AS IT SHOULD BE!!!! it seems that hover graphic is causing the problem. the ability is there. the trick is getting to it
Please steiny fix this!!!!!
Intel Xeon 2 x X5355 2.83 quad core/12 GB ram/ SSD main drive/Windows 8.1 64 bit/ Motu Ultralite Firewire 2G/CMC QC/CMC AI/Cubase 8/Waves V9/EZ Drummer2/EZ MIX/ Brainworx/Amplitube 3/MarkBass plug in/a bunch of NI stuff/ some Guitars/Basses/POD v2.0 blah blah blah =o)