Hello,
The Assaultware site changed host. Some of those links can be outdated. But the last stable version in HM2/NC is working and updating should happen automatically.
Try un-installing HM2 and re-install it. It should update Notecaddy to 2.9.9013.0. The last updated version for HM2.
The new Assaultware Wiki site is now here:
http://notecaddy.com/NoteCaddy.ashx
If uninstall/reinstall HM2 does not fix it we will talk in that support ticket and make sure we deal with this and get it running.
Best wishes,
jahrumble