Looks like a neat utility. I just tried under OS3.9 though the install script reports various errors including missing assigns that are not obvious where they should point to.
Also the 'Classic' binary doesn't run; "Unable to open your tool Jack".
The docs clearly state that it hasn't been tested on classic, so this is more of a message saying that it appears to need some attention.
Keep up the good work, would be nice to have this for OS3.9, even with limited functionality.