It's not really an issue, just wondering if there is a way to achieve what I am looking for

Correct me if I'm wrong, but I think hiding windows from alt+tab without pinning them to all virtual desktops should be possible. If the plan was to use Windows API, then I'm assuming the extended windows style WS_EX_TOOLWINDOW was being used which would indeed hide the window/s from the alt+tab but pin it to all virtual desktops. If so, a better solution would be to use the Windows API to set the owner of the grouped windows to a single owner window. By doing that, only the owner window will show up in the alt+tab menu and none of the windows will be pinned to all virtual desktops. Furthermore, the owner window could dynamically update to be the last active window in the group so that the alt+tab menu shows the group in the alt + tab menu as the last active window(in the group) & it will show that specific window's live preview. Or perhaps the owner window could be one created by Groupy 2 for the group so that it has it's own custom icon in the alt +tab menu and perhaps a custom thumbnail as the 'live preview' for easier/quicker identification.

Played some more... In SETTINGS | GENERAL, under taskbar button options, I had it set to "Show only active window". That works fine for the taskbar itself, but ALT-TAB still showed all windows in the group.

Then I changed the option to "Show only one combined button". After it changed the taskbar setup, that combined button showed 5/6/7 windows from the group. It varied. I don't know how/why it picked the number to display when hovering over the combined button. And ALT-TAB still showed all windows in the group.

Then I changed back to the "Show only active window" option. The taskbar icon then showed (when hovering over it) ALL the windows in the group, just like it did before using Groupy 2 at all.

Then I switched between (rolled through, showed) all the windows in the group, going to each tab. And then not only did the taskbar button go back to showing just the active window/tab, ALT-TAB also showed just a single window!

I have no idea what happens behind the scenes in that scenario, but it worked.

Now if I close the tabs and open them again, I have to go through that whole process again. So that combination seems to be tricking something, whether it's Groupy 2 or Windows itself (Win11 in this case).

I just tried your method of going to Groupy Settings > General > "How should taskbar buttons..." and toggling between "Show all" and "Show only active window". It didn't work at first, but eventually the second option was able to group the windows both on the taskbar and in Alt+Tab.

I am afraid things are not quite as simple as that.  Microsoft put that directly into the OS for MS edge only.

Hi Neil,

Just want to follow-up here. Are there any solutions in the works? I'm considering downgrading back to 1.5.1.

What I find curious is that cycling through the "How should taskbar buttons for grouped windows appear?" options makes the software behave exactly as you would expect. As demonstrated by hocl8thundr747, when the option is set to "Show only active windows," the taskbar displays only the active windows in the group, and the Alt-Tab menu does the same. This clearly shows that implementing such functionality is possible. I've added a video to illustrate my point.

Please consider addressing this issue—it’s clear that many users would appreciate having this feature.

Hello,
Sorry to hear you are having issues. I have forwarded your problem/question to Stardock Support Team for their assistance. Please keep an eye on this thread for any updates. We appreciate your feedback and patience.

Thank you,
Basj,
Stardock Community Assistant.

YES!! Thank you. ❤️