There is no security hole in Auction Wizard 2000's authorization system for eBay. It works exactly as eBay describes it in their API documentation. Once you authorize an eBay compatible application to interact with eBay on your behalf that authorization will remain valid until you cancel it, eBay revokes it, or it expires. Changing your User ID and/or Password on eBay will not affect any software you have authorized to interact with eBay for that account.
-- The Auction Wizard Team