Are you having the info in slides or in master? Which version of ppt do you
use?

If info is in slides, run this macro to replace all the text with old info

Sub ConvertSlideTexts()
Dim s1 As String
Dim s2 As String
s1 = "Earlier Company Info"
s2 = "Current Company Info"

For i = 1 To ActivePresentation.Slides.Count
   With ActivePresentation.Slides(i)
       For j = 1 To .Shapes.Count
           With .Shapes(j)
               If .HasTextFrame Then
                   .TextFrame.TextRange.Replace s1, s2
               End If
           End With
       Next j
   End With
Next i

End Sub

Probably View | Master | Slide Master, then change the info/graphics there.