You have the option to export all your organization data or only the data that has changed since the last export. OrgPro keeps track of what data changes between exports so that it can offer you this option of only exporting the changed data. You'll also have an option to export just the organization data, just the membership data, or both.
You would want to export all your data if:
Exporting only the changes results in a much smaller file and is the best choice under normal circumstances.
To export organization data, click Export All Org Data or Export Org Data Changes on the Data menu and the following dialog will be displayed.