To view the details of a record (reference), in the EndNote Library double click on the required reference. This opens a reference window. You can also select the Reference tab on the Tabs Panel to view the content of the Author, Year, Title, etc. field of the record. Select the Preview tab on the Tabs Panel to view the reference formatted in the reference style selected from the Bibliographic Output Style drop-down on the EndNote Library Window toolbar.

Close reference window

Close a reference window simply by selecting the lower close button in the top right corner of the EndNote  window (take care not to close the EndNote program by clicking on the upper close button). You can also go to the File menu and choose Close Reference (Ctrl + W).

Please follow a protocol of frequent backups of your EndNote library in order to be able to revert to a previous version if necessary.