BUg or error when downloading media

[Djwarcr .]

Version 7.0-beta-23

System.IO.IOException: The process cannot access the file 'E:\LaunchBox\Music\Nintendo Entertainment System\Blades of Steel.mp3' because it is being used by another process. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.File.InternalDelete(String path, Boolean checkHost) at (DownloadImagesForm , Object , EventArgs ) at Unbroken.LaunchBox.Desktop.Forms.DownloadImagesForm.downloadButton_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 (CustomButton , MouseEventArgs ) at Unbroken.LaunchBox.Desktop.Controls.CustomButton.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)

I got this error when I tried to overwrite music for a nes game

-win 7 64b -latest beta -23 -it just happened now, but it wont let me overwrite -for instance, Nes-blades of steal-overwrite music-ERROR

[Djwarcr .]

It seems that my Nes music got corrupted somehow, Launchbox and game folders remain in the same location. so when I tried to download the music media again, its when the error pops up