Thomas, the details are the same for mine. The tool works for me, I'm using XP home. Tab through the parameters, enter and I've got a bolt. An annoyance is that allocating a new WP drops the tool out, obliging reselection. OTOH, once I've snapped a location, I have to change tools to cancel it, escape doesn't cut it. Other than that, it works once location is picked, and I can set the thread portion parametrically and the body length manually. I can only guess you've got some other conflict, OS or installation. One difference in behaviour between 15 and 17 is that in 17, nothing happens unless I gesture (no buttons, just wave it about) the cursor in the drawing window once I've hit enter. In 15, hit enter and it's there. Dunno what that's about.