Reset Store: This determines whether you want to delete your stores products, images, attributes, combinations, manufacturers, and suppliers before import.
New Items: Specify what to do with new items from your feed. You can either add them as normal, or skip them to run a pure update only.
Existing Items: You can choose what to do with items in your feed that are also in your store already. You can either update them based on new data from the feed, or simply skip them to only add new products.
Identify Existing Products by Matching Field: In order to identify existing items, you will need to have a field in your feed that matches the same field in your PrestaShop store. Here you can specify which field this is, choosing between Name, Reference, EAN13/JAN, or UPC. It is recommended that you use Reference, UPC or EAN13 in preference to Name, as the match must be exact in order to identify existing products. Using Name is more risky.
Items in store but not in file: Specify what to do with items in your store that are not in the file. If your supplier has stopped selling a product you may want these deleted, disabled or ignored.
Identify Existing Combinations by Matching Field: In order to identify existing items, you will need to have a field in your feed that matches the same field in your PrestaShop store. Here you can specify which field this is, choosing between None if you don't want to update any combinations, Reference, EAN13/JAN, or UPC. It is recommended that you use Reference or EAN13 in preference to Name, as the match must be exact in order to identify existing combinations. Using Name is more risky.
Items to Import: This setting lets you make sub sets of products to import. This can be particularly useful if you find your server is struggling with the load of adding / updating all the products. To use the setting select 'Range' then add a range of products say 1 -> 1000. Once completed you can add more products by running it from 1001 -> 2000 and so on doing manageable subsets your server can handle.
Auto-Validate: This determines whether Total Import PRO will automatically modify or remove product fields that do not pass PrestaShop's validation standards. Selecting "No" will skip any product with invalid fields
Profiles: By typing a name of a profile in the top right input box you can save all settings up to this point for easy loading. You can find more on this in the profiles section. Saving a profile also allows you to run it automatically via cron.