Resolved! Claymore 2 - can't assign "L-ALT" key to another key via Armory Crate

Using AC 5.6.8.0 and wanting to use numpad as a game pad. Assigned keys without an issue except for ALT. I choose key I want like "+" on the numpad for example, and I can assign any key pretty much - even L-CTRL and R-CTRL appear, except for ALT. Is ...