Thanks for the update!
I'm loving Groupy! 
I noticed a little problem with this new feature:
- Adds : Option on Windows 8/10 to hide all taskbar buttons for windows in a group bar the active one (under more settings drop down).
I'm not sure if it's a known issue or not, but it doesn't hide UWP apps. On my system, I've got Skype, Pushbullet, Hip Chat, and Facebook Messenger (UWP) all in one group. However, on the taskbar, I always see the Facebook Messenger button. If Messenger is the active app, I only see the one button. But if any of the other apps in the group are active, I see their button along with the Messenger button.