Easiest way to upgrade from 1.2.11 to 1.3.4 ?

[OneMore]

Hello,

I could install two versions of xampp on localhost, with can be used at the same time:

• first one running PHP 7.1.33, with Abantecart 1.2.11
• second one running PHP 8.2.12, with Abantecart 1.3.4

I want to migrate the data (categories / products / zones-to-locations / ressources) from the 1.2.11 version to the 1.3.4, so that I can test the new features.

The shop is multilingual (English, French, German), the translations coming from the repository on GitHub.
There are very few other extensions installed (PayPal) but not configured yet.

I assume the best way is through System > Data > Backup / Restore rather than through System > Data > Import / Export.
Is this the way to go?

[Basara]

Hello.
You need to follow the upgrade process https://abantecart.atlassian.net/wiki/spaces/AD/pages/4980799/AbanteCart+Upgrade
1.2.11 -> 1.2.12 -> 1.2.13 ........
You cant use backup/restore as an upgrade