Hello,
For Booklibrary:
Before making any upgrades, you must make the backup of your website (files, folders and database).
At first check upgrade/update process at the test website.
You can not update Booklibrary to last version.
We recommended return to previous version of Joomla. And did not make any updates.
You can try update Booklibrary to last version, if you have version of Booklibrary not lover 3.1.
To get more details, write on our contact form
ordasoft.com/contact-us-form
Best Wishes,
Taras
OrdaSoft team