Look at Zen-Cart.com there are all FAQ in English.
I want to update my zen cart 138 (de) to 150 (de). I have already installed test shop (150) running with the new template. The only things what are missing are old databases for customers, products, categories, orders and etc. How to upgrade only this portion? I do not want to copy old files from old installation because there are a lot of unnecessary modules.
I do not know what I doing wrong but somehow it is not working.
1) I installed a new shop with a new database
2) I have imported old database (from zen 13 into the new one (zen 150)
3) I have run zc_install and made an update of the database (first from 138 to 139 and then from 139 to 150)
But nothing was imported to my new shop. No customers, no products, no orders
Your first step is wrong. In first step you load the files zen cart version 1.5 on your webspace.
->create new database
->import your old database
->import your configure.php and admin/includes/configure.php from your old shop prefer your database name and password etc.
->run zc_install and try upgrade
Thx. Now it is working. Thx