When I buy powers in Torghast (solo, haven't tested with group) this addon doesn't prevent the dialogue box, though it's working fine for other alternative currency purchases.

Turns out this is a slightly different popup. This one is for non-refundable items. This will be an option in v13. The alpha is posted if you want to preview it; the final version should be out shortly.

Note to self: Fixed in commit f114519