Sub Demo()
Application.ScreenUpdating = False
Dim i As Long
With ActiveDocument.Range
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "00R"
    .Replacement.Text = ""
    .Forward = True
    .Format = True
    .Style = "Total Points and Test Version"
    .Wrap = wdFindStop
    .MatchWholeWord = True
    .MatchWildcards = False
    .Execute
  End With
  Do While .Find.Found
    i = i + 1
    .Text = Format(i, "000")
    .Collapse wdCollapseEnd
    .Find.Execute
  Loop
End With
Application.ScreenUpdating = True
MsgBox i & " instances updated."
End Sub