I had the same confusion, but got it working.
Remove the old scrutiny App (you can leave the image and have a CA Backup in case).
Delete scrutiny.yaml from /mnt/user/appdata/scrutiny as the settings are outdated.
Add the new analogj image:
Leave the first three options the same
I set Config to match the old image:
/mnt/user/appdata/scrutiny/
I made a new path for influxdb:
/mnt/user/appdata/scrutiny/influxdb/
Let it run for a few minutes. You can check the log to see things like the below if you wish.
msg="Trying to connect to scrutiny sqlite db: /opt/scrutiny/config/scrutiny.db\n"
msg="Database migration starting. Please wait, this process may take a long time....
Once it finished, the webserver started working, my old data was present, and everything is fine.