I only use groupy to group explorer.exe windows & I continue to see issues with the "+" add a tab button; usually does not work when the first tab is focused but not always. So for example I have 2 explorer tabs with focus on the 1st tab then hit the "+" button and nothing happens. Focus on the 2nd tab & then hit the "+" button and things work. But at times it does work as expected so what I get is a random behavior.