Sorry, but I give up, I need your help...

How do I install the Comet Alignment module?
I have searched and read all I can find, but I am getting nowhere.
I have downloaded the module from:
http://pixinsight.com/forum/index.php?topic=3980.0I picked Bin for PI 1.7.x: Win x64
Unziped the file which is: CometAlignment-pxm.dll
First I tried to add it as a script, because that's what I thought it was, but the script folder only has .js files, so I put it in the dll folder and re-ran PI, still nothing.
Please, what am I doing wrong.
In the Manage Repositries I have
http://update.pixinsight.com/http://update-devel.pixinsight.com/But when I do a check for updates, it finds nothing new, yet I have just the basic install of scripts, are new ones not added via this method?
Thank you,
Mike