With the default monodevelop options, the .exe file works strangely in Windows. A console window is opened for no reason!
To get around this, the app should be compiled from the command line after editing the make file to say target:winexe instead of target:exe
To give the exe an icon in Widows, also add the compile option: -win32icon:tkd.ico
To compile, just run ./make.sh after making the changes.