The support rocks, all the more amazing since this is freeware.

I contacted the developer regarding the issue with opening files in 10.3.9, now about a week later he's already fixed Tubby with a new version. Even with shareware I've never experienced such responsivness from a developer.

Now I'm almost done purging my HD of that nasty-arse proprietary windows CHM format. 'Tis a great day, when you can say you have one less Microsoft file type on your system.

Tubby does what it says, does it well, and is in active development. It's even free. Good luck finding other freeware this good!