Do you mean "crashing" or "freezing"? Assuming you mean freezing, how big is the document, and how long have you waited?
What exact Word version?
If it's a large document with many citations, you should make sure you've disabled "Automatically update citations" in the plugin's Document Preferences.
Upgrade Storage
What exact Word version?
If it's a large document with many citations, you should make sure you've disabled "Automatically update citations" in the plugin's Document Preferences.