Library only works for Arduino Uno and others based on the ATmega328. The pins are hard coded into the library for better performance, only port D and the SPI Pins are used.
LA / A -> Digital Pin 4
LB / B -> Digital Pin 5
LC / C -> Digital Pin 6
LD / D -> Digital Pin 7
CLK -> Digital Pin 13
R1 / R -> Digital Pin 11
OE / EN -> Digital Pin 3
LAT / STB -> Digital Pin 2
The library increases the Timer2 frequency so that the PWM runs on 32 kHz. Affected are only the pins 3 and 11, both occupied by the interface.