For those who can't play after patching the latest patch for v1.22:
You get the error "cannot find war3.exe"

Visit the following website
http://liczniki.org/warfix.html
and click "Download here"

It works and has no viruses.
I know this is the Internet and who knows if I'm trustable, but you've got nothing to lose. And I'll attest to its legit-ness.

Good luck and happy playing.