instructions for Cas12 prediction

Nice tool!
It would be really useful if detailed instructions are added regarding which files and lines should be edited in order to use this program for Cas12a.
Or adding Cas12 editors into selection list. 
Also, since the training data was Cas9, does it mean that Cas12a effects can be predicted only in those sequences that also contain Cas9 PAM site?

Thanks,
Astula