If you already have a RefWorks account, upgrade by logging in to your account then click on the link: Move to the newest version of RefWorks from Proquest.
It is possible to use both your new and old account, but changes you make to the references in your new account won't show in the old account. In ongoing work you need to reinsert the references.
Keep using old RefWorks if:
Upgrade to new RefWorks if: