Active word file is not appearing in Endnote

When a word file is citing from endnote it appears in the endnote on top left. However, mine has stopped appearing. It was a great resource to see which documents have been cited. 

Can someone help me restore it? I have tried restarting both programs and windows. 

what does your screen look like?  Are other groups, Sync Status …, Recently Added, Unfiled, Trash, still showing?  Have you updated citations and bibliography or added a new citation? (try that).  or have you moved the left menu so it isn’t showing?  What version of endnote?  

Thanks. Adding a new citation solved the problem!