You can get the current latest NoteCaddy build from http://www.assaultware.com/notecaddy.2.9.83.0.zip (when a newer version is out you can replace the version number in the link).
It can be installed by closing HM2 and unpacking the .zip file into C:\Program Files (x86)\Holdem Manager 2.
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After updating to a Beta version it's always a good idea to reset the NoteCaddy settings:
Be aware that doing this will change your settings in NoteCaddy back to their default settings.
*Resetting HM2 NC Settings*
1. To reset NC to factory defaults, close HM2 and go into: C:\Users\[WindowsUsername]\AppData\Roaming\HoldemManager.
2. In this directory move all of your .xml files into a new folder (these serve as backup files).
3. Restart HM2, go back into NoteCaddy. Import your ColorDefinitions.xml that you backed up previously (NoteCaddy → Tools → Import Color Definitions).
4. Once that is done, then go into NoteCaddy → File → Settings, adjust them to your preferences.
5. Reset and reprocess the notes: http://wiki.assaultware.com/How-to-r...ddy-notes.ashx
The builds that are not included by default with HM2 are not thoroughly tested with HM2, so there is a good chance there will be issues. If something is not working for you in the default NoteCaddy that is included in HM2, you can try updating to a newer version by following the method above.