EndNote library reduced to 0 octet

I am on a MacBook Pro with Mac OS Sierra version 10.12.6 and EndNote X7.8 + MS Word for Mac 2011 Version 14.0.0.

The last time I used EndNote was apparently on December 31. Now my library does not open and when I look into it it has 0 octet! And I cannot repair it.

Can anyone explain me what may have happened? I am sometimes absent-minded but I doubt very much I was such a champ in the field to erase my library.

Is there a solution?

Thank you in advance.


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