Librarian on shared drive

(Win 10 ) Librarian by default installs on the C: drive. This means that my two machines (especially my solid state laptop with limited space) have to carry a GB of data.
I tried moving the library to my shared drive where all my other FF work sits. Librarian took in a location for the library but the load failed. Having done this, I gave librarian the original location but that gave the same error.
I uninstalled and reinstalled to the default place - and that is still failing, remembering the shared drive location - presumably in the registry somewhere.
Ideas please for (1) shared drive use or (2) how to get Librarian working again even if on the C: drive!?

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westdale wrote: I tried moving the library to my shared drive

What particular files/folders did you move from what location?

Also, by 'shared drive' do you mean a network location or a removable disk?