The examples I have seen all used analog servos. The 5645 is digital. As I understand it, programs such as you mention are detecting the potentiometer position. Since that aspect is shared by both digital and analog, I suspect a digital servo will also work with that program.
Digital servos are much more susceptible to jitter than analog ones are. For example, simple 555-based servo drivers don't work very well with digital servos. So, the program may work, but you may see a lot more jitter.
Please let us know what happens.
John