Looking at the UI I'm thinking that the search field in the main UI is unnecessarily long. Why not shorten that and use the space to put a library selection box which displays the current library name in front of it.
I think it's a reasonable place and you can combine an identifier and a quick option to select the library at startup or later (which may or may not be shown if one only uses a single library, but create a new one or duplicate could be also an item in the selection box). Just "thinking loud".
I think it's a reasonable place and you can combine an identifier and a quick option to select the library at startup or later (which may or may not be shown if one only uses a single library, but create a new one or duplicate could be also an item in the selection box). Just "thinking loud".