Download and install KeyTools from Keyworks.net.
Download the sample CHM file decompile.chm and place it in a folder.
Open decompile.CHM
(downloaded in the previous step) and examine the settings.
This help file contains the following characteristics: Two help windows
(main & second), browse sequences, ALINK controls, map numbers for
context sensitive help and text-only popup topics.
Also note the size, position, and window settings.
Close the Help file.
Open Windows Explorer.
Right
click the decompile.chm file and choose Examine.

Note
some of the sections:

The Alias section above is the combined MAP and ALIAS information stored
in the original Help project.
Close the CHM/ITS File Viewer.
Start KeyTools
(Start: Programs: KeyWorks: KeyTools.

Click Decompile.
In Source file choose the decompile.chm file downloaded in the section above.
Change the destination folder to the same location as the CHM folder.
Place a check mark next to Create a project file.
Click OK.
