How to turn off autocomplete in a procedure window

Igor procedure windows have a feature that tries to complete what you're typing with various functions or operations. I find this to be more of a hinderance than a useful feature. Is there a way to turn it off?

You might also consider changing the completion key trigger to tab, so that you can still have the autocomplete options available but you won't accidentally select one of the options with the enter key. That's configured in the same place.