Only my first external tool in the list works

Description

In my list of external tools (I have 14), only the first item appearing in the list works. Everything else triggers these errors:

----------
ErrorMsg
2016-06-20 2:24:28 PM
Connection failed!
Index was outside the bounds of the array.
----------
ErrorMsg
2016-06-20 2:15:02 PM
ExternalApp.Start() failed.
Index was outside the bounds of the array.
----------

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

- - - - Exception Text **************
        System.InvalidCastException: Unable to cast object of type 'System.Windows.Forms.ToolStripMenuItem' to type 'System.Windows.Forms.Control'.
        at mRemoteNG.UI.Window.ConnectionTreeWindow.cMenTreeToolsExternalAppsEntry_Click(Object sender, EventArgs e)
        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.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)

- - - - Loaded Assemblies **************
        mscorlib
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.127.1 built by: NETFXREL3STAGE
        CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
        ----------------------------------------
        mRemoteNG
        Assembly Version: 1.74.5995.14790
        Win32 Version: 1.74.5995.14790
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/mRemoteNG.exe
        ----------------------------------------
        System.Windows.Forms
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.79.0 built by: NETFXREL2
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
        ----------------------------------------
        System
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.1075.0 built by: NETFXREL3STAGE
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
        ----------------------------------------
        System.Drawing
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.1068.2 built by: NETFXREL3STAGE
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
        ----------------------------------------
        System.Configuration
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.79.0 built by: NETFXREL2
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
        ----------------------------------------
        System.Core
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.79.0 built by: NETFXREL2
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
        ----------------------------------------
        System.Xml
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.1064.2 built by: NETFXREL3STAGE
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
        ----------------------------------------
        log4net
        Assembly Version: 1.2.15.0
        Win32 Version: 1.2.15.0
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/log4net.DLL
        ----------------------------------------
        System.Management
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.79.0 built by: NETFXREL2
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Management/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Management.dll
        ----------------------------------------
        WeifenLuo.WinFormsUI.Docking
        Assembly Version: 2.9.0.0
        Win32 Version: 2.9.0.0
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/WeifenLuo.WinFormsUI.Docking.DLL
        ----------------------------------------
        WeifenLuo.WinFormsUI.Docking.ThemeVS2012Light
        Assembly Version: 2.9.0.0
        Win32 Version: 2.9.0.0
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/WeifenLuo.WinFormsUI.Docking.ThemeVS2012Light.DLL
        ----------------------------------------
        mRemoteNG.resources
        Assembly Version: 1.74.5995.14790
        Win32 Version: 1.74.5995.14790
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/en-US/mRemoteNG.resources.DLL
        ----------------------------------------
        MagicLibrary
        Assembly Version: 1.7.4.0
        Win32 Version: 1.7.4.0
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/MagicLibrary.DLL
        ----------------------------------------
        FilteredPropertyGrid
        Assembly Version: 1.0.2258.31541
        Win32 Version: 1.0.0.0
        CodeBase: file:///C:/Program%20Files%20(x86)/mRemoteNG/FilteredPropertyGrid.DLL
        ----------------------------------------
        System.Web
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.114.0 built by: NETFXREL3STAGE
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_32/System.Web/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Web.dll
        ----------------------------------------
        Accessibility
        Assembly Version: 4.0.0.0
        Win32 Version: 4.6.79.0 built by: NETFXREL2
        CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Accessibility/v4.0_4.0.0.0__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.

Environment

Windows 10 Pro
Core i3
8 GB RAM
.NET 4.5

Assignee

Sean K

Reporter

Idon

Labels

None

Fix versions

1.74

Affects versions

1.74 RC 2

1.74 RC 3

Priority

Major

Configure