I have no hot keys on spells in the game?
But they were in the old versions of the game. How to turn it on?
You can find the hotkeys on the config menus if you want.
the lack of buttons in the new version looks like a bug.
You're right, this was indeed a regression, introduced roughly a year ago it looks like. I've just fixed it, wasn't actually too hard to track down. Can't say when Lars is gonna make a patch that includes the fix though.