Unable to import ROM folder or ROM

[Former user]

The given key was not present in the dictionary.

App: LaunchBox Version: 7.13 Type: System.Collections.Generic.KeyNotFoundException Site: TValue get_Item(TKey) Source: mscorlib

at System.Collections.Concurrent.ConcurrentDictionary`2.get_Item(TKey key) at (ImportGamesFromFilesWizardForm , Object , WizardPageConfirmEventArgs ) at Unbroken.LaunchBox.Desktop.Forms.ImportGamesFromFilesWizardForm.readyWizardPage_Commit(Object sender, WizardPageConfirmEventArgs e) at AeroWizard.WizardPage.OnCommit() at AeroWizard.WizardPageContainer.NextPage(WizardPage nextPage, Boolean skipCommit) at AeroWizard.WizardPageContainer.nextButton_Click(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.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.Button.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Recent Log:

6:01:33 PM Music.Pause Start 6:01:33 PM Music.Prepare Start 6:01:33 PM Music.Kill Start 6:01:33 PM Music.Kill Finished 6:01:33 PM Music.NotifyTrackList Start 6:01:33 PM Music.NotifyTrackList Invoke 6:34:12 PM Exception