From a little research on your question, it looks like PAF Pal would do what you are asking. I found this old posting. Note that it specifcally says * Clear Custom ID fields, PAF Pal is available from Ohanasoftware.com so you can probably use it for free at Family History Centers. Please contact your local FHC to confirm this. The closest FHC can be found by using one of the search forms on the Home page at familysearch.org
From: Richard L Halliday Subject: [Elijah-L] PAF Pal Date: Mon, 13 May 2002 09:27:30 -0700
I have received several enquiries about PAF Pal and what it does. Following is a summary.
PAF Pal operates on a PAF 5 database to accomplish the following * Works from within PAF 5.x * Search and replace parts of names * Search and Replace LDS temple codes * Remove Submitted or Sub dates from LDS date fields * Clear Custom ID fields, Ancestral File Numbers or all LDS fields * When clearing fields or searching/replacing, reports of which records are changed can be created. * Enable additional Internet searches (Ancestry.com, Genealogy.com and RootsWeb.com) * Remove forgotten passwords from PAF 5 * In a single step you can abbreviate USA states, Canadian provinces and/or Great Britain county places. * Expand abbreviations for USA states, Canadian provinces and/or Great Britain counties *.Automatically add or remove "USA" or "U.S.A." from places in the United States of America * Display or print statistics about the people in your file. * Print lists, by date, of records that have been changed or records that have been submitted to Ancestral File * Enables the use of *.OUP files created by TempleReady for Windows to transfer temples and ordinance dates found by TempleReady for Windows
Richard L. Halliday email@example.com West Linn (near Portland), Oregon
Genealogy without documented sources is little better than gossip.