Just a little expansion on what has been said here. Things
like favorites, tab settings, search history and the position of
the CHM window when last closed are kept in the hh.dat file which
is unique to each user. This file is typically kept in this path:
\Documents and Settings\%username%\Application Data\Microsoft\HTML
Help. It keeps track of all CHM activity, not just one. That's why
you can overwrite a CHM file and still retain those settings. If
you delete or rename that hh.dat file, Windows will just create a
new one.
john
John Daigle
Adobe Certified RoboHelp and Captivate Instructor
Newport, Oregon