After Effects just stopped responding to Alt+number keyboard shortcuts.

This is weird.

AE today just stopped responding to Alt+number key combinations.

So no switching between channels for me.

What is more interesting I am unable to set any keyborad shortcut between Alt+1 to Alt+0

I can use 1, I can use Shift+1, I can even use Shift+Alt+1 but not Alt+1 (or any other number).

I can use the numbers on the number pad, it's just the normal number keys that AE refuses to work with.

Also Alt+ any other key besides the numbers still works.

Haven't installed anything since yesterday, didn't change anything in windows.

Any ideas?