Worked around a method binding problem on Windows.

src/ChartImage.cs

@@ -39,7 +39,7 @@ public class ChartImage
             else {
                 if ( ! mShortcuts.ContainsKey( shortcut ) )
                     mShortcuts[ shortcut ] = new List<ChartImage>() ;
-                logger.Info( $"Registering shortcut: {shortcutString(shortcut.Item1,shortcut.Item2)} => ${caption()}" ) ;
+                logger.Info( $"Registering shortcut: {shortcutString(shortcut.Item1,shortcut.Item2)} => {caption()}" ) ;
                 mShortcuts[ shortcut ].Add( this ) ;
             }
         }
@@ -144,7 +144,8 @@ public class ChartImage
     private Tuple<Keys,Keys> parseShortcut( string val )
     {
         // parse the shortcut
-        string[] parts = val.ToLower().Split( "-" ) ;
+        // FUDGE! Can't just pass in '-' since a Mono-compiled EXE has trouble running on Windows :-/
+        string[] parts = val.ToLower().Split( new char[]{'-'} ) ;
         Keys modifiers = 0 ;
         for ( int i=0 ; i < parts.Length-1 ; ++i ) {
             if ( parts[i] == "ctrl" )