The service routine should work with 2.50.

I've had it all working while embedded into various other programs from 2.47 to 2.60. This time I just put it all in an include file that's specific to your situation. Well, a lot of peoples situations.

You should be aware that USB is handled differently in PBP 2.60.
Programs from earlier versions will have to be modified to work with it.

And since your program is coming from HIDmaker, you'll probably need an upgrade if you've had it awhile. I don't know that for sure because I don't use it, but it only seems logical.