I do know this add-in is not supported, but other users here at the forum may have encountered something similar:
The add-in installs on my Win XP and I can see it under Control panel - Add or remove programs. It does not however show up under add-ins in Excel 2010. I have tried reinstalling, rebooting, enabling / disabling the DDE-thing under advanced settings, nothing seems to make it visible so I can enable and use the add-in.
IT had to install it for me (using another account) since local admin rights are not granted, but apart from that I simply can't figure out why I can't get it to work this time after having used it in the past on another Excel 2007 PC...
Any suggestions much appreciated.. :-)