:want: I spoke to Zenrin customer service today. I purchased their DVD NAV Version 6.3 in June 05 and asked what the upgrade price was for the NEW Version 6.4. There is no upgrade price. If you want the NEWEST Version 6.4, you must pay the full $190.00 purchase price plus shipping. Going from version 6.3 to 6.4 should be minor changes other than alot of Canada included on the new version. If it was available and reasonable, I would have upgraded and sold my 6.3 version at a fair price. Although, their price is reasonable compared to the Cadillac factory disc, I'm not impressed with the people at Zenrin.