importing Endnote xml file to Endnote Web

This seemed to be the closest to my problem but it relates to an enl file. I lost my laptop but had my whole library for Endnote X3 saved within dropbox. My insitution no longer supports the software and recommends using endnoteweb. I’ve logged into my account myself (not an institutional login) but there’s nowhere that seemed to upload and sync an enl file wihtout the software? Should I download the demo… and transfer files then to endnoteweb? What will happen all of my attachments? [Using Windows 10]

Thanks C