The HxConv.exe and HxMerge.exe utilities were inadvertently removed when the development team pulled the Archive sample folder out of the SDK. Unfortunately, the Help 2.0 utilities were inappropriately contained in the old Help Integration sample, and were not moved to a more appropriate location. The components can still be retrieved from the older V4 SDK (for VS 2005). There is a bug logged against this, but the Help experience for VS 2010 will be updated to MS Help 3.0, so the tools may not appear in the next version of the SDK either.
Details on the upcoming help experience is very light right now. About the only public info I could find is on the
HelpWare.Net site.
Sincerely,
Ed Dore