How to crack Help to RTF v2.12b - 2.12 Final+:

16 bit (hlp2rt.exe)
====================================
search 26 80 3f 00 75 32 eb 23 c4 5e
change                00 
search 56 04 66 3b c2 75 05 8b 46 f4
change                   00

32 bit (hlprtf32.exe)
====================================
search 2c 33 c0 eb 32 8a 1e 80 fb 20
change 00
search 3b 55 10 75 07 25 ff ff 00 00
change             00

Then create a hlp2rtf.key file with just one line of text in
it. The hlp2rtf.key file must NOT contain a carriage return, 
line feed, or space. Place it in the program directory.


This has worked for a long time now, at least the last
3 versions.

Saltine [PC]