I think these Duplicati-server.sqlite databases are in different spots, totally independent.
Need some developer input, e.g. has the database form of the password now changed?
This might have been done for security tightening, e.g. maybe better password hashing.
Documentation of what to do is pretty weak and scattered, but maybe try something like:
C:\Program Files\Duplicati 2>Duplicati.CommandLine.ServerUtil.exe change-password --server-datafolder "C:\Windows\System32\config\systemprofile\AppData\Local\Duplicati"
Connecting to http://localhost:8200/...
Please provide the new password: ********
in Command Prompt (Admin) or similar, as default DB location needs admin for access.
EDIT:
Securing the database and password hash info might explain need to re-enter password.
I’m not sure, but it would be nice if old password could be converted into the new design.
Hashing is usually meant to prevent this, but the info speaks about some prior weakness.