I want the source to be my compressed ZIP file, not the destination. How do I do that?

SyncBack V7 or newer: Modify the profile, select Easy from the Click For Options button (top-left of the window) or select Easy from the list on the left, go to the Type settings page, and select the second option (to copy Destination to Source, the exact text may be different depending on the labels you have given to your locations).

SyncBack V6: Modify the profile, go to the Decisions > Files settings page, click the "Click here to see more options" box at the top of the window, and click the second button (Backup Destination to Source, note that the button label may be different depending on what labels you are using).