With NAV 2013 R2 Update Rollup 3, in the process of build sealing, it has been changed the Library GUID used to register Microsoft.Dynamics.Nav.Client.WinForms.tlb.
Accordingly to this previous blog post: Installing Microsoft Dynamics NAV 2013 R2 Side-by-Side with Microsoft Dynamics NAV 2013, the TypeLib GUID has been changed from the RTM value of {5020AC1E-A4F0-402B-A920-3FED4E3B05CC} to {95819FD3-CF0A-4706-BE93-35B3DDCB817C}.
Due to this change, if you try to patch a Microsoft Dynamics NAV 2013 R2 DVD with the latest platform hotfix from Update Rollup 3, you will probably receive an error from the Setup.exe that is related to a missing registration of this TypeLib during the installation of the Microsoft Dynamics NAV Windows client.