I do have a single "user" record in the clean (unregistered) 3.3.0 install, but I don't know enough to alter it correctly:
Field Value
UserID dec75cef-493f-4da1-af8d-d7a7183fa3e5
UserKey 0a0e4b93-68fd-455a-b716-039e7c973dce
UserDisplayName
demobundle06_13@kobo.com
UserEmail
demobundle06_13@kobo.com
__DeviceID
FacebookAuthToken
HasMadePurchase false
IsOneStoreAccount FALSE
IsChildAccount FALSE