You can click on 'add-ons' and you will be connected to additional profiles for ingredients, styles, and equipment. Selecting to filter for equipment, there is one profile for a Brewzilla 65L, but not the 35L model. You may be able to modify this profile based upon the size of your unit which would give you a starting point.
Your next best bet is to check the many videos on YouTube for setting up an equipment profile and search this forum and Brad's blog posts for guides on how to create an equipment profile.
Either way, each profile would need to be 'dialed-in' to fit your particular unit and process. Take good readings of your volumes and gravity during your first few brews and use these values plugged into BeerSmith to help you with improving the accuracy of the software in predicting your targets.