SBPro 6 Zoom bar sensitivity

I just upgraded to SBPro 6 and I’m having trouble with zoom bar being too sensitive. It used to be that one touch would increase or decrease the size of the drawing about 20 percent. The more you touched it, the more or less zoom you’d get. Now, with the update it’s virtually unusable because one touch will increase the drawing size to over 13000 percent. Is there a way to reset it to a range that is more reasonable? Does it have something to do with the project resolution? Appreciate the help. I don’t like using keys for the zoom.