Horde Extras?

[NightStorm]

3. [+] Optional Horde applications are added: Ingo e-mail filter rules manager, Kronolith calendar, Mnemo note manager, Turba address book

Now, I've dug through the forum a bit, and I've dug through the horde directory, and I've dug through the PSA FAQ... I can not seem to get these things enabled on my Horde system.
We're running PLesk 7.5.3, so according to that little "What's New" blurb, these things should be there... somewhere.
So umm... where? And how?

 

[Hultenius]

These are optional features. You have to install them first.
Install the horde extra pack from the updater.

 

[Cranky]

Alternatively, they're in the opt/horde/ directory of the plesk download.