When I try to use the latest (as on Sep 10 2017) FiddlerCertMaker with Fiddler v4.6.20172.34691 it throws the below error: See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.TypeLoadException: Could not load type 'Fiddler.ICertificateProvider4' from assembly 'Fiddler, Version=4.6.20172.34691, Culture=neutral, PublicKeyToken=null'. at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes) at System.Reflection.RuntimeAssembly.GetExportedTypes() at Fiddler.CertMaker.() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\CertMaker.cs:line 111 at Fiddler.CertMaker.EnsureReady() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\CertMaker.cs:line 69 at ..(Object , EventArgs ) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Options.cs:line 2153 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.CheckBox.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)