I do not have EngRef installed at the moment but IIRC you can NOT edit the wizard inputs after creation.
You would simply need to re-run the wizard and re-produce the desired results.
EDIT: I do HAve Eng REf and my recollection was/is correct. you can not edit the wizard inputs.. note that you have a gear profile and pattern... but those are about worthless for another mesh set up...
FWIW: I seldom model 3D Gears. I model simplified at Pitch diameter and thickness than simply callout on drawing with standards or ref a purchased stock item #.
Edit2: Silly "ASSuME"tion form me that you were making a gear. reckon it could be any of the wizard options.
Matt Johnson Solid Edge Certified Professional (ST7 & ST8) Solid Edge ST9 (SEEC) - Production SE2019 Pre-Production Testing NX11 (Tc Integration) Pre-Production Testing Teamcenter 10.1.7