Add group is disabled in sub groups

Hi,
Could you post a print screen of your main screen where its disabled? You can't add a group if a session is selected.

is there a security group set on the parent-folder? do you have "ADD-Right" in this security group?

Image attached.

I'm sorry but your print screen is from Microsoft Remote Desktop Connection Manager and you are on the Devolutions Remote Desktop Manager:

http://remotedesktopmanager.com/

lol

Haha, just noticed this thread.
An honest mistake, but a damn funny one I must say :)

Yes it's really funny but the good new is that there is a workaround. Install Devolutions Remote Desktop Manager and everything will be fine :)