Trakt Mono - Cannot find the specified file

[joopdo]

If I press 'click to authorise account' TraktRater crashes with:

System.ComponentModel.Win32Exception (0x80004005): Cannot find the specified file
  at System.Diagnostics.Process.StartWithShellExecuteEx (System.Diagnostics.ProcessStartInfo startInfo) [0x00129] in <a85c1a570f9a4f9f9c3d2cfa5504e34f>:0 
  at System.Diagnostics.Process.Start () [0x00038] in <a85c1a570f9a4f9f9c3d2cfa5504e34f>:0 
  at (wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
  at System.Diagnostics.Process.Start (System.Diagnostics.ProcessStartInfo startInfo) [0x0001e] in <a85c1a570f9a4f9f9c3d2cfa5504e34f>:0 
  at System.Diagnostics.Process.Start (System.String fileName) [0x00006] in <a85c1a570f9a4f9f9c3d2cfa5504e34f>:0 
  at TraktRater.TraktRater.lnkTraktOAuth_LinkClicked (System.Object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e) [0x00077] in <4e209d36cb794bfba0f9831f678e970a>:0 
  at System.Windows.Forms.LinkLabel.OnLinkClicked (System.Windows.Forms.LinkLabelLinkClickedEventArgs e) [0x0001c] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.LinkLabel.OnMouseUp (System.Windows.Forms.MouseEventArgs e) [0x0006f] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.Control.WmLButtonUp (System.Windows.Forms.Message& m) [0x0007e] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x0016f] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.Label.WndProc (System.Windows.Forms.Message& m) [0x00025] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.LinkLabel.WndProc (System.Windows.Forms.Message& msg) [0x00000] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x0000b] in <a3daa9b84fd241a497578a25f68bc3c7>:0 
  at System.Windows.Forms.NativeWindow.WndProc (System.IntPtr hWnd, System.Windows.Forms.Msg msg, System.IntPtr wParam, System.IntPtr lParam) [0x0008e] in <a3daa9b84fd241a497578a25f68bc3c7>:0