Those saved groups will not be listed there. That listing is for Application grouping. If you click ->3 dots menu -> "Automatically group all "xxxxxxx.xxx" windows together" than "xxxxxxx.xxx" will appear there. Something like screenshot below.

To view all your saved groups. Click on that "View my saved groups" button. If nothing show up than something is wrong,
Please try purge and reinstall steps as mention here : [Link]. Just make sure to redownload the latest version from your account page. Reboot after the purge. Reinstall and reboot again after the installation. Retest and report back here.
Thank you,
Basj,
Stardock Community Assistant.