-- choose Yes if you want to keep your modifications.
If you want to create a bibliography that will be used elsewhere than in a word processing program -- for example, on a webpage or on a Powerpoint file -- you can do that as well from your Zotero library.
This method works with any word processor, or anywhere you can paste text.
Zotero comes with the most common bibliographic styles, but many more are available to download.
The new style will appear in Zotero's style lists.