Does it work with the stock interface?
Are you using shift for anything in the Blizzard keybindings menu?
Left click it , and it should switch to a different mode.
Doublecheck that Dominos_Progress is in your addons menu. If not, then reinstall.
Perhaps its a setting in weak auras somewhere?
Jaliborc has been the maintainer of Bagnon (as well as Combuctor, Ludwig, and OmniCC) for roughly 6 years now. I do hope he hasn't fallen off the earth.
Try reinstalling the addon then, you're probably just missing a folder.
Doublecheck your tooltip settings in the Blizzard Options menu.
There's not really a way to do it with Dominos.