Rename in the sames Directory the Config to e.g.: Microsoft.Dynamics.Nav.Client.exe.config_
OR
Start a cmd-shell
Execute following command. Please change the path to your needs: C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /register "C:\Program Files (x86)\Microsoft Dynamics NAV\80\RoleTailored Client\Microsoft.Dynamics.Nav.Client.WinForms.dll" /tlb
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