The only buttons that exist are the shortcut bar ones. I never used those before. I don't like them because they take up space in the shortcut bar and there are other things I'd rather have there. What happened to the buttons in the top left corner?

Nothing. they are still present. https://prnt.sc/wfsydt

After some trying I detect, that they are not shown under certain circumstances if the mod is added later.
As workaround in settings you can toggle all check boxes off: https://prnt.sc/wft0da
apply the change, go back to the game and recheck the boxes in the the settings again.

I have queued this issue in my to-do list. but experience shows that this takes longer in foreign code.

finally fixed