$5,99 on gog.com.
Hope the patch can be applied on that version too.
Reinstalling!
Though, I had unofficial version of that patch already done by some russian coder half year back or so.
1.18 was released for retail version. I was playing with this version some 3 years ago.I suspect lack of interest from the boxed version publisher to be the real reason why 1.18 and 1.19 official patches never saw the light of day for boxed versions though