How to change angle of bevel modifier?

My bevel seems to be locked at 60 degrees no matter what I do, and I’d like to have it at 45 (or ideally, control the angle).

What am I missing here:

Apply scale to the object

Oh, for christ’s sake! I forgot about that, thanks.

Still, to be able to adjust the angle of a chamfer/bevel would be a nice addition.