Reply to problems with my s4 + pro 2 PLEASE HELP

After I imported mappings for my midi fighter pro, my pro 2 has never ran well. I've tried to reinstall the software multiple times but I still have these problems.

The software glitches and freezes. Audio skips beats sometimes, and the audio grid hops around. I've tried to change the latency like someone suggested, it helped a little, but didn't correct it fully.

What's a good range of latency to be in?

Again, this all happened when I imported midi mappings a few months ago. I initially tried to uninstall the software and reinstall after. A major question I'd like to be answered is, if I reinstall the pro2 software, does it overwrite any previous pro 2 software that's left on my Mac?

Thanks a lot!!