Document files can not be opened ver 11.0.14

I can not open the document files which I have stored my database.
I have been openning all the documen files (visio,pdf etc.) before yesterday but now I can not open them.
Do you have any suggestions ?or this is a new bug (ver. 11.0.14)



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FileNotFoundException - Could not load file or assembly 'DevExpress.Images.v15.2, Version=15.2.3.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a' or one of its dependencies. The system cannot find the file specified.

at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection)
at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
at System.Reflection.Assembly.Load(String assemblyString)
at DevExpress.Utils.DxImageAssemblyUtil.LoadImageAssembly()
at DevExpress.Utils.DxImageAssemblyUtil..ctor()
at DevExpress.Utils.DxImageAssemblyUtil.get_Instance()
at DevExpress.Utils.DxImageUriParser.DoParse()
at DevExpress.Utils.DxImageUri.OnChanged()
at DevExpress.XtraBars.Navigation.NavigationPageBase..ctor()
at DevExpress.XtraBars.Navigation.NavigationPage..ctor()
at DevExpress.XtraPdfViewer.PdfViewer..ctor()
at Devolutions.RemoteDesktopManager.Business.FreEmbeddedNativePDFBrowser.c49f0ccb73296dc8b9a91a4b256a04664()
at Devolutions.RemoteDesktopManager.Business.FreEmbeddedNativePDFBrowser.DoInitializeComponent()
at Devolutions.RemoteDesktopManager.Frames.FreBase..ctor()
at Devolutions.RemoteDesktopManager.Frames.Embedded.FreEmbeddedView..ctor()
at Devolutions.RemoteDesktopManager.Frames.Embedded.FreEmbeddedView..ctor(EmbededConnectionResult embededConnectionResult)
at Devolutions.RemoteDesktopManager.Business.FreEmbeddedNativePDFBrowser..ctor(String fileName, EmbededConnectionResult embededConnectionResult)
at Devolutions.RemoteDesktopManager.Business.Connectors.EmbeddedPDFDocumentConnector.CreateFrame(EmbededConnectionResult result)
at Devolutions.RemoteDesktopManager.Business.Connectors.EmbeddedConnector.Connect(Connection connection, OpenConnectionMode openConnectionMode)
at Devolutions.RemoteDesktopManager.Managers.ConnectionManager.OpenConnection(Connection connection, OpenConnectionParameter parameter)
at Devolutions.RemoteDesktopManager.Managers.ConnectionManager.OpenConnections(Connection[] connectionList, OpenConnectionParameter parameter)
at Devolutions.RemoteDesktopManager.Managers.ActionManager.c2d3a897d165d9e56a0d53f388986ac51(Connection[] cfabc0254f46d7d8ae5a71db9e5a0b5b5, OpenConnectionMode c602973c05c2f5870e41c508b048b13c5, IConnectionSource c5b7a41272702648f46cf77ee6b3a92cb)
at Devolutions.RemoteDesktopManager.Managers.ActionManager.OpenConnections(OpenConnectionMode openConnectionMode, IConnectionSource source, Boolean checkOpenedConnection)
at Devolutions.RemoteDesktopManager.Managers.SessionMenuManager.c552f6de7933b91b08a4107f7410f30d0(Object c19f185fd70cefc696ba148af1c4faf54, EventArgs cf1018bb83ec7debd818319fd3cb4844e)
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.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.PerformClick()
at Devolutions.RemoteDesktopManager.Frames.FreDashBoardBase.ButtonOnClick(Object sender, EventArgs eventArgs)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at DevExpress.XtraEditors.BaseButton.OnClick(EventArgs e)
at DevExpress.XtraEditors.BaseButton.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at DevExpress.Utils.Controls.ControlBase.WndProc(Message& m)
at DevExpress.XtraEditors.BaseControl.WndProc(Message& msg)
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)

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