I dont see how a virtual instance would make any difference. The max memory setting could be an issue try using phpmyadmin and export the products table. In my case the products table was the largest with the product descriptions taking the most space. Apsona will only pull from one table at a time from what I can remember so I guess I dont understand why a complete export would not work through phpmyadmin. Now importing is completely different but at least it would be a start. The only issues I could remember having had to do with uploads not downloads.