You can run everything with AHK Basic and you don't need both versions. Thanks for all the info today and really sorry for the hassle. Man, that kind of stuff is annoying. Fortunately, now that we've figured all this out, you should be able to see the close buttons on the individual Sai windows. I probably won't be able to work on this again until late Sunday so you're off duty! Don't hesitate to report any bug/idea while you're using the previous versions (hopefully I'll be able to post an updated version with some of the stuff in the previous posts soon). And maybe take a look at that other ruler/grid program we discussed earlier. I actually ended up using the grid with one of my chemistry programs today and it was really useful and quick to set up! I will probably start using it myself! Although maybe you'll find that it's not really what you need.