Cavemanbob,
When I go to change the settings in the latest client, when I click the OK button to save them, I get the following:

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

************** Exception Text **************
System.IO.IOException: The process cannot access the file "C:\Documents and Settings\Desktop\myseq\prefs.xml" because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String str)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean useAsync, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode)
at myseq.Form1.savePrefs(String filename)
at myseq.Form1.menuItem5_Click(Object sender, EventArgs e)
at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
at System.Windows.Forms.MenuItemData.Execute()
at System.Windows.Forms.Command.Invoke()
at System.Windows.Forms.Control.WmCommand(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Mes sage& m)
at System.Windows.Forms.ContainerControl.WndProc(Mess age& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage (Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(M essage& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.288
CodeBase: file:///c:/windows/microsoft.net/framework/v1.0.3705/mscorlib.dll
----------------------------------------
myseq
Assembly Version: 1.0.1201.35167
Win32 Version: 1.0.1201.35167
CodeBase: file:///C:/Documents%20and%20Settings/Desktop/myseq/myseq.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.288
CodeBase: file:///c:/windows/assembly/gac/system.windows.forms/1.0.3300.0__b77a5c561934e089/system.windows.forms.dll
----------------------------------------
System
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.288
CodeBase: file:///c:/windows/assembly/gac/system/1.0.3300.0__b77a5c561934e089/system.dll
----------------------------------------
System.Drawing
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.288
CodeBase: file:///c:/windows/assembly/gac/system.drawing/1.0.3300.0__b03f5f7f11d50a3a/system.drawing.dll
----------------------------------------
System.Runtime.Serialization.Formatters.Soap
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.288
CodeBase: file:///c:/windows/assembly/gac/system.runtime.serialization.formatters.soap/1.0.3300.0__b03f5f7f11d50a3a/system.runtime.serialization.formatters.soap.dll
----------------------------------------
System.Xml
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.288
CodeBase: file:///c:/windows/assembly/gac/system.xml/1.0.3300.0__b77a5c561934e089/system.xml.dll
----------------------------------------

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

For example:

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

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the machine
rather than being handled by this dialog.