Servers that were imported from Defendr 1 get one migration card instead of the welcome card. It lists only the points where version 2 works differently from what your server had, and every row has buttons that stay usable for as long as the row exists — months later as well.
The most important row is the suspect role. Version 1 assigned it from unreviewed third-party lists; version 2 does not use those lists for roles. The button removes the role from exactly those members whose only basis was such an imported entry, and from nobody else: members who got the role by hand keep it, and Defendr can only remove the role, never add one.
Every row that changes a setting writes a normal configuration entry, so you see it in the history and can undo it.
/setup