From what I understand, the controller is a PWM one (Pulse With Modulation). I don't thing there is a voltage or current regulation.
It should just give a constant peak voltage output but a variable duration (PWM) so as to have a variation in the brightness of the led.
According to Specs:
the...
Where is the short?
Is it the cable? Repair it.
Is it at the output? Check the diodes that do the rectification and the diode that is parallel to the output and protects from overvoltages to the load. Sometimes is a zener diode.
If the short is at the input and blows the mains fuse then...