Z3ta+ bug and how to make a dropping pitch??

Hey there, Cakewalk Brethren
 
 
After having played with Z3ta+ for a while, after ages of not realising how good it was, I've started to become more accustomed to its controls...
 
However, I'm having trouble making a sound that drops from high to low in pitch???
 
I've tried various settings and such in the modulation matrix but can't seem to manage to get anything remotely close to moving the pitch like that.??? I'm aiming for a sort of sweeping/dropping growling sound.
 
 
Bugs... I've noticed recently, sometimes after fiddling with the Arpeggiator or some of the matrix controls Z3ta+ seems to glitch and will play screetchy high pitch sounds, or (when regarding the Arp) it will either play nothing, or a sustain a note continuously and have to stop it manually.
 
 
Thanks in advance!

Here's the Patch: https://sites.google.com/...zip?attredirects=0&d=1