I extracted the Help.chm using the HTML Help Workshop[FONT='Calibri','sans-serif'](M:\Program Files (x86)\htmlhelp\hhw.exe) [/font]with the File-decompile option.

After changing 1 or 2 html files for testing ,I tried to compile but it asked for a hhp file. So I created .hhp file using New-Project and added the .hhc,.hhk & .htm files to be incuded .(When I decompiled the Help.chm it extracted .html,.hhc,.hhk files)

When I compile this new .hhp to Help.chm, its size is 571 KB. But the original Help.chm is 879 KB.

Also If I decompile the original Help.chm it says “575 files extracted”. But the new Help.chm when decompiled says “570 files extracted”.

Please let me know if you have any inputs on this.