Null Reference Exception in wyBuildSolved

One of my coworkers brought this to my attention (both on his XP 32-bit system and my 7 64-bit system):

In wyBuild, open a project with an FTP upload site configured. Click on "Upload your updates", then click "Edit site" and leave the information open. Click on a new tab (or otherwise open another project) and then click "Upload your Updates" again. The update site information is the same, so click "apply changes" and the following unhandled exception occurs:

See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************System.NullReferenceException: Object reference not set to an instance of an object. at wyBuild.Project.RenameSite(UndoRedoInfo ur, SiteType type) at wyBuild.Project.RenameSite(TreeNode site, Url url, TreeView refControl) at wyBuild.frmMain.btnAddFTPUploadSite_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.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)

************** Loaded Assemblies **************mscorlib Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll----------------------------------------wybuild Assembly Version: 2.6.4.0 Win32 Version: 2.6.4.0 CodeBase: file:///C:/Program%20Files%20(x86)/wyBuild/wybuild.exe----------------------------------------System Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll----------------------------------------System.Windows.Forms Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll----------------------------------------System.Drawing Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll----------------------------------------Controls Assembly Version: 2.6.1.0 Win32 Version: 2.6.1.0 CodeBase: file:///C:/Program%20Files%20(x86)/wyBuild/Controls.DLL----------------------------------------System.Configuration Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll----------------------------------------System.Xml Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll----------------------------------------System.Web Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_32/System.Web/2.0.0.0__b03f5f7f11d50a3a/System.Web.dll----------------------------------------Accessibility Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Accessibility/2.0.0.0__b03f5f7f11d50a3a/Accessibility.dll----------------------------------------

************** JIT Debugging **************To enable just-in-time (JIT) debugging, the .config file for thisapplication or computer (machine.config) must have thejitDebugging value set in the system.windows.forms section.The application must also be compiled with debuggingenabled.

For example:

<configuration> <system.windows.forms jitDebugging="true" /></configuration>

When JIT debugging is enabled, any unhandled exceptionwill be sent to the JIT debugger registered on the computerrather than be handled by this dialog box.