Aw! Now you done broke it!

I tried ignoring the error but now Price Comparison by Station has no system names in dropdown (though 'By Commodity' shows all the data is there). Never mind, I will delete the whole thing and start again. I still have all the CSVs so it is only the commanders logs that I lose and that is not a major issue. Jiust giving you this info in case there is something you want to fix.
Addendum: I renamed the old directory. Can I move across the Commanders Log files from there? Do I also copy across the CommandersLogAutoSave? What about the .bak version?
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2015/05/31 08:58:42: ERROR: Error in main init function
2015/05/31 08:58:45: ERROR: System.IO.IOException: Cannot create a file when that file already exists.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.__Error.WinIOError()
at System.IO.File.InternalMove(String sourceFileName, String destFileName, Boolean checkHost)
at RegulatedNoise.Form1.SaveSettings() in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 1198
at RegulatedNoise.Form1.cbActivateOCRTab_CheckedChanged(Object sender, EventArgs e) in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 6189
at System.Windows.Forms.CheckBox.OnCheckedChanged(EventArgs e)
at System.Windows.Forms.CheckBox.set_CheckState(CheckState value)
at System.Windows.Forms.CheckBox.set_Checked(Boolean value)
at RegulatedNoise.Form1.ApplySettings() in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 850
at RegulatedNoise.Form1..ctor() in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 243
2015/05/31 08:58:45: ERROR: Cannot create a file when that file already exists.
2015/05/31 08:58:45: ERROR: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.__Error.WinIOError()
at System.IO.File.InternalMove(String sourceFileName, String destFileName, Boolean checkHost)
at RegulatedNoise.Form1.SaveSettings() in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 1198
at RegulatedNoise.Form1.cbActivateOCRTab_CheckedChanged(Object sender, EventArgs e) in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 6189
at System.Windows.Forms.CheckBox.OnCheckedChanged(EventArgs e)
at System.Windows.Forms.CheckBox.set_CheckState(CheckState value)
at System.Windows.Forms.CheckBox.set_Checked(Boolean value)
at RegulatedNoise.Form1.ApplySettings() in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 850
at RegulatedNoise.Form1..ctor() in e:\dev\VS2013\RegulatedNoise.git_DukeJones\RegulatedNoise\Form1.cs:line 243