I'm experiencing the same issue, but found that if I click the "Add House Number" button, and deployed a HN, then I could use the "h" key again afterwards. Seems to be almost like the double "h" issue.
Edit: I also just discovered if the "Next #:" box is empty, the "h" key doesn't do anything, but if I put a value in there, and tab off of it, then I can use the "h" key.
Edit: I also just discovered if the "Next #:" box is empty, the "h" key doesn't do anything, but if I put a value in there, and tab off of it, then I can use the "h" key.
Re: [Script] WME Rapid House Numbers