v1.31 released, incorporating COPS 3.5.4
@carlkalmar I am thinking of allowing users to write their own $config['calibre_directory'] string in the Add-on config, which would allow setting multiple databases. The default would be the current string, so those using a single database could just let it be.
Would this approach work for you?
This does present an opportunity for people to break things so I need to think carefully about how to achieve it to minimise that risk.
That solution sounds like a good option for the minority who would like to take advantage of the possibility of multiple databases.