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- Don't save images: the upgrade process normally doesn't touch your images folder. If you have made a proper back of all your files, you might wish to let the process take care of that folder too, in order to have a clean install again and re-upload your files. Nevertheless, it not recommended to do this.
- Keep theme "prestashop": the upgrade process overwrites the default theme with its latest incarnation. If you have made changes to the theme directly, you can protect these changes by choosing "Yes". It is NOT recommended to edit the default theme! You should make a copy of the theme, and make changes to that copy.
- Keep translations: same as for the default theme, if you have made changes to the PrestaShop translation files, you can protect theses changes by choosing "Yes".
The Upgrade process
The update button itself is at the center of the page.
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Everything working fine? Congratulations, you know have successfully upgraded your PrestaShop install!
Rollbacks
Sadly, not all upgrades are successful – which is the very reason why you should always backup all your files and data, and why PrestaShop performs an additional backup of said files and data itself (which you should not always count on, obviously. Make your own backup first).
PrestaShop's own backup files are saved on your server, and if it turns your an update has gone badly, you can find them in the "Rollback" section of the "Upgrade" sub-tab.
There are three available options:
- restoreFiles: takes the files from the latest backup, and re-installs them in place of those from the current installed version.
- restoreDb: takes the data from the latest backup, and re-installs it in place of that from the current database.
- Rollback: Triggers both restoreFile's and restoreDb's actions