when i did a 30 day trial of lightroom I practiced and created some presets and signature. Now with the formal version they seem to be gone. Is there a hidden file of some sort?
Which version of Lightroom are you using?
Which operating system are you using?
Are you referring to any 3rd party presets that you have installed?
Have you created a new catalog?
If you are not using the exact same catalog as the trial, go to the Preferences dialog and see if you have "save presets with catalog" turned on. (If yes, turn it off.)