We're aware and extremely sorry that our installers sometimes do not properly install our factory presets. We're working with our distributor to fix this issue. As a temporary workaround, here is a link to a repository with all factory presets for each plugin.
1. Copy the necessary preset folder into the correct directory. The location depends on your operating system and product name. Here is an example for LION:
Mac Factory Folder: ~/Library/Audio/Presets/Plugin Alliance/Unfiltered Audio LION
Mac User Folder: ~/Library/Audio/Presets/Unfiltered Audio LION
Windows User Folder: C:\Users\UserName\AppData\Roaming\UnfilteredAudio\LION\Presets\
Windows Factory Folder: C:\ProgramData\UnfilteredAudio\LION\Presets
2. You should now see the presets appear in your plugin preset menu.