ll worked fine until this morning. I updated client and after that the following msg appears (using cgminer on Win7)

Code:

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

************** Exception Text **************
System.InvalidOperationException: Sequence contains no matching element
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at MultiMiner.Win.MainForm.SaveGridValuesToConfiguration()
   at MultiMiner.Win.MainForm.SaveChanges()
   at MultiMiner.Win.MainForm.startButton_Click(Object sender, EventArgs e)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStrip.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.ToolStrip.WndProc(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: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll
----------------------------------------
MultiMiner.Win
   Assembly Version: 1.2.25.0
   Win32 Version: 1.2.25
   CodeBase: file:///***/Local/MultiMiner/MultiMiner.Win.exe
----------------------------------------
MultiMiner.Utility
   Assembly Version: 1.0.0.0
   Win32 Version: 1.0.0.0
   CodeBase: file:///***/Local/MultiMiner/MultiMiner.Utility.DLL
----------------------------------------
System
   Assembly Version: 2.0.0.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   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: 2.0.50727.5420 (Win7SP1.050727-5400)
   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: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
MultiMiner.Engine
   Assembly Version: 1.2.25.0
   Win32 Version: 1.2.25
   CodeBase: file:///***/Local/MultiMiner/MultiMiner.Engine.DLL
----------------------------------------
MultiMiner.Xgminer
   Assembly Version: 1.2.25.0
   Win32 Version: 1.2.25
   CodeBase: file:///***/Local/MultiMiner/MultiMiner.Xgminer.DLL
----------------------------------------
MultiMiner.Coinchoose.Api
   Assembly Version: 1.2.25.0
   Win32 Version: 1.2.25
   CodeBase: file:///***/Local/MultiMiner/MultiMiner.Coinchoose.Api.DLL
----------------------------------------
System.Xml
   Assembly Version: 2.0.0.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Core
   Assembly Version: 3.5.0.0
   Win32 Version: 3.5.30729.5420 built by: Win7SP1
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Core/3.5.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Configuration
   Assembly Version: 2.0.0.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
dkxcqhsk
   Assembly Version: 1.2.25.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
qwz5m9f5
   Assembly Version: 2.0.0.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
Newtonsoft.Json
   Assembly Version: 4.5.0.0
   Win32 Version: 5.0.6.16206
   CodeBase: file:///***/Local/MultiMiner/Newtonsoft.Json.DLL
----------------------------------------
hffx4aqg
   Assembly Version: 2.0.0.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
s_38vfof
   Assembly Version: 2.0.0.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
cqg7yfuk
   Assembly Version: 1.2.25.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
c3rdndw1
   Assembly Version: 1.2.25.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
1yvct1tw
   Assembly Version: 1.2.25.0
   Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
   CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
Interop.Shell32
   Assembly Version: 1.0.0.0
   Win32 Version: 1.0.0.0
   CodeBase: file:///***/Local/MultiMiner/Interop.Shell32.DLL
----------------------------------------
Interop.IWshRuntimeLibrary
   Assembly Version: 1.0.0.0
   Win32 Version: 1.0.0.0
   CodeBase: file:///***/Local/MultiMiner/Interop.IWshRuntimeLibrary.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 this
application or computer (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:



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