Administration 

In the normal case the categories from the category table and its enhancements are used. You have to set

$TYPO3_CONF_VARS['EXTCONF']['tt_products']['pageAsCategory'] = 0;

to be able to use them. Otherwise the pages will form the category and the category will be used as subcategory ( = 1) or not used at all but replaced by the page ( = 2).

The flexforms in the backup are always activated automatically.