IMPORTANT: if you have full-text PDFs saved to your RefWorks account, those will not transfer with the export/import process.
You will need to reacquire the PDFs in your new citation management tool.
Do a Folder-by-Folder Export if you would like to maintain your folder structure in your new citation manager.
PRO: it maintains your structure.
CON: it takes more time.
Do a full library export if you would like to batch export all of your references at once.
PRO: it saves time
CON: it will not maintain your folder structure in a new citation management tool