Crashing exception error

[dreadbalaur]

The program still works fine on my end for 99% of the time for the last few years, but occassionally it runs into this error. Error log reproduced in full below.

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

Exception Text 
System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at ShowDesktopOneMonitor.MainAppContext.OnShowDesktopDirect(Int32 screenIdx) in C:\Users\Valerio\Desktop\Repos\ShowDesktopOneMonitor\ShowDesktopOneMonitor\MainAppContext.cs:line 55
   at ShowDesktopOneMonitor.MainAppContext.OnShowDesktopKeyComb() in C:\Users\Valerio\Desktop\Repos\ShowDesktopOneMonitor\ShowDesktopOneMonitor\MainAppContext.cs:line 51
   at ShowDesktopOneMonitor.MainAppContext.HotKeyManager_HotKeyPressed(Object sender, HotKeyEventArgs e) in C:\Users\Valerio\Desktop\Repos\ShowDesktopOneMonitor\ShowDesktopOneMonitor\MainAppContext.cs:line 41
   at ShowDesktopOneMonitor.HotKeyManager.OnHotKeyPressed(HotKeyEventArgs e) in C:\Users\Valerio\Desktop\Repos\ShowDesktopOneMonitor\ShowDesktopOneMonitor\HotKeyManager.cs:line 42
   at ShowDesktopOneMonitor.HotKeyManager.MessageWindow.WndProc(Message& m) in C:\Users\Valerio\Desktop\Repos\ShowDesktopOneMonitor\ShowDesktopOneMonitor\HotKeyManager.cs:line 74
   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: 4.8.9310.0 built by: NET481REL1LAST_C
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll

ShowDesktopOneMonitor
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/Ricing/ShowDesktopOneMonitor/ShowDesktopOneMonitor.exe

System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.8.9251.0 built by: NET481REL1LAST_C
    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: 4.8.9320.0 built by: NET481REL1LAST_B
    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: 4.8.9037.0 built by: NET481REL1
    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: 4.8.9037.0 built by: NET481REL1
    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: 4.8.9316.0 built by: NET481REL1LAST_C
    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: 4.8.9037.0 built by: NET481REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll

Accessibility
    Assembly Version: 4.0.0.0
    Win32 Version: 4.8.9037.0 built by: NET481REL1
    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:

<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 computer
rather than be handled by this dialog box.