Duplicate files crashes

[marcmmmassart]

When I click on "duplicate files" I get a box with:

MusicBee v3.1.6512.37408 (Win10.0), 23 dec 2017 12:07:

System.NullReferenceException: Object reference not set to an instance of an object.
   at MusicBee.MusicBeeMain.#=qsDW2a6tFL3KbmNCx_Ug3fJmxUkdb_vKhBVOO03hGohg=._Lambda$__0()
   at MusicBee.MusicBeeMain.#=q3OPTEaJxeK$4Km93znS7CWgSbbwUNskpBGWEgCeFB$M=(#=q7oR9a059Z6ikX8xC9U22eKATIewlvJG52yxbM4Sw2lc= #=qMlkAAseZlqcTG1pouv084Q==, #=qHylXEV85uast_Vf4fgkuL5b49mT$ob9AYbVCFUImfL0=& #=q9xEtiIooz_D1tpcrlovxGQ==, #=qSsPXUfZMVBeGpWceIh0hePzS9QNfZsZoVshFmomlMfo=& #=q95WmkHAAkgPLXTVdMEN9aw==, #=q$uGrQnKQv7INBVep9YNcWLi9_jNBQ_4_vkYouQnhiHU=& #=qbwXOYSijF2Knu1YoffFi$Q==)
   at MusicBee.MusicBeeMain.#=qOxCSwPJb7AZaOjM$20V0Ow==(#=q7oR9a059Z6ikX8xC9U22eKATIewlvJG52yxbM4Sw2lc= #=qlntsWujwlPp1EZEwYRo0nQ==, #=qHylXEV85uast_Vf4fgkuL5b49mT$ob9AYbVCFUImfL0=& #=qoBmB36Fp6v9kmvYm$gp1mQ==, #=qSsPXUfZMVBeGpWceIh0hePzS9QNfZsZoVshFmomlMfo=& #=qbS933tciI9NCJPKi_hhSqg==, #=q$uGrQnKQv7INBVep9YNcWLi9_jNBQ_4_vkYouQnhiHU=& #=qeApg8xfY1HOzRgWcK8C_iA==)
   at MusicBee.MusicBeeApplication.#=qEzj9PJeqnwjsxQIff5Bbqw==.#=ql6A5$Wom6bNHypvNywGQtQ==(ApplicationCommand #=qp$AsJbtZM24Mb8t8pKKa_g==, Object #=qRi_XuqehbC5Nxe3c45f3Uw==, IList`1 #=qv6XcQr7knzjQoyX0$KywuQ==)
   at #=q6FZ$gWqfM2mdzJGG3F7pz$rWAUxid2hWySmH8yekQaw=.OnClick(EventArgs #=q1NaH6n2KCSlZ60f7uCKuAw==)
   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)

[Steven]

i think thats already been fixed:
http://musicbee.niblseed.com/V3_1/MusicBee31_Patched.zip

unzip and replace the existing files

Do you recall what you had displayed in the main panel - was it the music library and which view were you using?