A rough way to export all products is go to the Host/SQL screen, and enter:
select ProductID, ModelNumber, ModelName, DownloadUrl from Smith_Products
Copy the output, paste to a text editor. Use search/replace, or write some code to wrap the data with the necessary XML tags.
To see all the columns available, do:
select column_name, data_type from information_schema.columns where table_name='Smith_Products'