Sudden loss of all settings and library when attempting to load snapshot

[iristwirl]

I'm running 3.3.7310 on my main computer, and I'd recently managed to revive a laptop I thought was dead, so among the files I'd retrieved from it was a backup of the instance of MusicBee (Version 2, but I don't know which update specifically) I'd had on there. I was trying to load the settings I'd had on that instance into my main version of MB, and since it showed a compatible and selectable file in the Load Settings Snapshot dialog, I thought I'd be able to load my settings in successfully.

However, doing so rendered my library and layout as seen in MB blank, as though it was a fresh install (the music files themselves along with the other files from my installation, appear untouched). When I try to load the "!! previous settings" file from the Saved Settings folder within my appdata folder, it gives me an unexpected error which it instructed me to report here:

MusicBee v3.3.7310.31925D  (Win10.0), 29 Dec 2020 23:23:

#=zCf4VQ_fbhtH95rz2gNmFAbQ=+#=zQpNJpAzXUl5a+#=zbyY4mKBij0RF: The process cannot access the file because it is being used by another process. [C:\Users\Ben\AppData\Roaming\MusicBee\MusicBee3Settings.ini]
   at #=zCf4VQ_fbhtH95rz2gNmFAbQ=.#=zQpNJpAzXUl5a.#=zu5xWrFY=.#=zKN_Cq4s=(#=zlkE2wlw28gwaYlXF4g== #=z99nYcap$iMbi, #=zlkE2wlw28gwaYlXF4g== #=zeneE4Ytpu6ju, Boolean #=zJTtBcLI5q0cI, Boolean #=zmFaAsvwdppoG)
   at #=zdRddAG2q7x5I$VaZLhRt54nbElrv.#=zj$n9AIIlH415.#=z$mZBFz2QelwbvfrY7G_XYuM=(Object #=z2g8LTV4=, EventArgs #=zS9VYR_E=)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)