First of all you should adjust the various settings by pressing the button shown below:
and then adjust at least the serial port name and speed in the window that appears:
now try to move the printer's head by using the various buttons in the "jog" section:
If all is OK, try to load a GCode file and print it, otherwise
try
to change the serial port settings and disconnect and then reconnect
the printer.
The other various buttons are vary simple to understand and there is a
brief description for them all in the upper part of the main window.
If you find something wrong do not hesitate to send me an email.