Maybe it's because of the new Factorio DLC, but the mod appears not usable. Clicking the text box to enter an item name does not let me type, and instead interpretens my key presses as hotkeys. Anything I'm doing wrong ?

Hi. I assume you mean you couldn't get the mod's GUI to work.
The mod does not select items by typing their name. The text box only accepts number inputs (the desired production rate). You select the item using the button to the right of the text input instead.

Problem is the keyboard-combination in 2.0: ALT + C is already used for copper wire. So a wired race condition starts that usually results in the case hat you have a copper wire in your hand when opening the GUI and since E closes it, you can not pick something else. Since copper wires don't have receipts any more you can not calculate anything.
So: Just change the key combination for either copper wire or the mod to something else. I recommend something not on the US-Keyboard since none uses this as default key combination ;-).