We used the converter because it is the one available here: http://opensolution.org/download/quick.cart-and-quick-cart-ext-other.html and it says "Database converter from Quick.Cart v4.x to v5.x to v6.x"
Thanks for your tip: http://opensolution.org/forum/?iTopic=11885 We also tried that once, but the whole website went blank. But we will try that one more time.
Yes, this time we avoided the blank page and the suggestions in http://opensolution.org/forum/?iTopic=11885 worked. However, we still have issues: -Thumbnails are visible in the product list, but when you click on a product, the left side thumbnails do not show. The right side thumbnails do show. (yes, all images are in both 150 and 180 folders) -On pages and products, there is only an option for "Thumbnail 1". Not 2. Or maybe there is no 2nd thumbnail in 6.6? -Adding to cart does not work...it seems "Order Form" page is not recognized -Many products were associated to parent page "Top Menu 2nd" and "Products". Some still are on the front end, but on the back end there is no option to choose the "Top menu 2nd"...Only "Products". On "Pages" however, Parent Page can be both form Top Menu 2nd and Products. -In Settings, Print order page can not be set, as there is no Print order page.
Seems like too many issues for it to be a clean upgrade...