The reason for this is that the .NET Framework Assembly was not updated when you upgraded the Silk Performer. So when upgrading from one Silk Performer version to another, its necessary to update the reference to our .NET Framework Assembly (perfdotnetfw.dll) in the visual studio project. So to be able to run it successfully: Remove the old reference to perfdotnetfw.dll (that can be done in the solution explorer view). Add a new reference to the perfdotnetfw.dll located in the Silk Performer installation directory.
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