В Field Calculator (check Advanced check box ) помести следующее выражение:
Dim pSearchString As String
Dim pSearchChar As String
Dim pNewSymbol As String
Dim pNewString As String
pSearchChar = "'"
pNewSymbol = "ь"
pSearchString = [YOUR_FIELD]
pNewString = Replace(pSearchString, pSearchChar, pNewSymbol)
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[YOUR_FIELD] = pNewString
<!-- Message ''"" -->