Open or restart your DAW so it can scan the new plug-in.
If Pocket Click is not listed immediately, use your DAW's plug-in manager to rescan.
Your default Pro Tools Track Preset is installed in Documents/Pro Tools/Track Presets/Pocket Click. Restart Pro Tools, then select Track Presets → Pocket Click in the New Tracks dialog.
If you selected Logic / Audio Unit presets, they are in your home folder under Library/Audio/Presets/In The Box Audio/Pocket Click. Use the plug-in header's preset/settings menu to load them.
If you selected Ableton presets, look in User Library → Presets → Audio Effects → Audio Effect Rack → Pocket Click. Drag a rack onto a track.
Ableton presets are also available in Music/Pocket Click Presets/Ableton in your home folder. If your custom User Library was unavailable, drag these racks into Live or add this folder to Places in Live's browser.
Any differing same-named Logic or Ableton presets replaced during installation are backed up in Music/Pocket Click Preset Backups in your home folder.