It is a little rough to get it working (for example, I had to turn all colors off for my tracks), but on big project it really saves time. What problems are you having?
Did you write Phil? He usually responds pretty promptly. I’m just not sure it’s been updated to work with Cubase 8. You might try the Solo button icon fix (which he mentions on his site). Or maybe remove all the colors of your tracks like I had to do. Also, I made sure my tracks were all the same height and names were clearly legible. And transport has to be showing.
If you can’t get it to work, it might be worth making a template with groups that you use :-/