Cite While You Write: change round to square brackets (Vancouver)

I need to change round brackets to square brackets in the Cite While You Write plugin with Vancouver style. However, I can’t figure out how to do this. The plugin uses round brackets by default.

Thanks.

endnote online or desktop?  Online you can’t change.  – desktop you change the output style’s citation template.  

Thanks. I’m using the plugin in Word and I edit my references on the website. So I guess I can’t change it in that case?

As I understand it – unless you have a Administrator for your Endnote Online thru your institution.  

https://support.clarivate.com/Endnote/s/article/EndNote-online-Requesting-Administrator-Access?language=en_US

and https://support.clarivate.com/Endnote/s/article/EndNote-online-Creating-a-new-output-style-or-modifying-an-existing-style?language=en_US where it says near the end: 

 and Your EndNote online Administrator should be able to upload the output style following the instructions below,

myendnoteweb.com/help/en_us/ENW/ha_styles.htm