Update WBAMS WBAMS updates itself from the control panel, checks every file it downloads, and keeps a copy of what it replaces so a failed update puts things back.
Can an update be rolled back? If an update fails part way, WBAMS puts back every file it had replaced and removes what it added. After a successful update one copy of the replaced files is kept, so they can be put back by hand. Always back up the database before updating.
