installed Vista Ultimate, build 6000
installed Office Ultimate (2007) with all tools, all options, all features
installed SnagIt 8.2.0

SnagIt used Outlook 2007 (not Windows Mail) for automatic email output, fine and Ok

uninstalled Outlook 2007
SnagIt will not revert back to Windows Mail as it can not find a working email client

had to remove entire Office Ultimate to get back email function for SnagIt