Procedure given as under:
Please create a folder in Application Data folder, named IntraPDF, for example,
C:\Documents and Settings\Username\Application Data\IntraPDF\ and put the key file provided (pdf2html.data) into the software`s data catalog, for example, C:\Documents and Settings\Username\Application Data\IntraPDF\pdf2html.data.
The software should be registered now.
But it remained "DEMO" so I un-installed