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The steps of the upgrade process are:

1. Save and Backup Your Current Store:
   • Deactivate your store ("Maintenance" page of the "Preferences" menu).
   • Back up your files to your desktop, using your FTP client in a new "prestashop-prod" folder. This will be a complete copy of your production site.
   • Back up your database ("Advanced Parameters/DB Backup" page, or using phpMyAdmin).
   • Back up your customized translation ("Export a language" section in "Tools/Translations" tab).
2. Getting ready for the new version:
   • Download and unzip the latest version of PrestaShop: http://www.prestashop.com/en/download, and unpack it in a new "prestashop-prep" folder.
   • Copy your personal files (images, logos, photos, translations, modules, etc.) from "prestashop-prod" to "prestashop-prep" on your computer. A detailed list is available further down in this guide.
   • Copy the "prestashop-prep" folder to the web folder on your local server (/htdocs, /www, or any other name used by the server package you chose). This is the folder where you will first try to upgrade your PrestaShop, keeping your original backed-up files (prestashop-prod) and the files you prepared (prestashop-prep).
   • Recreate the production database on your local server: using phpMyAdmin, create a local database in which you will put the data from your production shop, using the SQL files that were backed-up at the start of the process.
3. Starting the Local Update:
   • Launch the update script on your local server by accessing it with your browser. In version 1.5, that script is located at /install/upgrade/upgrade.php.
   • Verification of all parameters before the update: follow the instructions on screen and make sure your server conforms to the new version technical requirements.
   • Finishing the update: once the updater has finished, delete the /install folder and access both your front and back-office to make sure it works.
4. QA and Testing:
   • Import your translations ("Import a language pack manually" section in "Localization/Translations" page).
   • Check that your theme is still working as expected. If this is not the case, you will have to edit its files.
   • Test your shop thoroughly: create accounts, buy products, cancel orders, check the invoices, etc.
5. Start the update on your production web server:
   • Using your FTP client, replace the files for your online shop with those from your "prestashop-prep" folder.
   • Launch the update script on your production server by accessing it with your browser. In version 1.5, that script is located at /install/upgrade/upgrade.php.
   • Verification of all parameters before the update: follow the instructions on screen and make sure your server conforms to the new version technical requirements.
   • Finishing the update: once the updater has finished, delete the /install folder and access both your front and back-office to make sure it works.
   • Import your translations ("Import a language pack manually" section in "Localization/Translations" page).
   • Check that the main domain name is correct ("Preferences / SEO & URLs" page, "Shop URL" section).
   • Regenerate your robots.txt files ("Preferences / SEO & URLs" page, "Generate robots.txt" section).
   • Check that your theme still works as expected. If not, you will have to edit its files.
   • Test your store thoroughly: create accounts, buy products, cancel orders, check invoices, etc.
6. Going live with your up-to-date store
   • Activate your store ("Maintenance" page under the "Preferences" menu).

You're done! Enjoy all the new features brought by this update!

Step 1 – Save and Backup Your Current Store

Deactivating Your Store

Go to your store's back-office, open the "Maintenance" page under the "Preference" menu, then select "No" for the "Enable Shop" option.

In the "Maintenance IP" field, located just below the "Enable Shop" one, enter your own IP address, so that you can keep on using your store during the update. This will allow you to test the front-office of your store, while still making sure visitors cannot access the website.
In order to find out your IP address, visit this page: http://whatismyipaddress.com/

Backing Up Your Files

You must back up all of the files related to your PrestaShop store, and store them on your computer.

There are two main ways of backing up your files:

• Ask your hosting company to back up your files.
  Make sure that this backup is fully functional, recent, and more importantly that it reflects the content of your current store.

...or...

• Copy all of your files from your server to your local computer using an FTP client.
  This method is only possible if your hosting provider has provided you with an FTP access to your server. Create a "prestashop-prod" folder on the Desktop of your computer, then, using an FTP client (such as the free FileZilla client, which you can download at http://filezilla-project.org/), select all the PrestaShop files and folders on your server (use the Ctrl-A command) and copy them to that local "prestashop-prod" folder.

Backing Up Your Database

You must absolutely back up the whole database for your PrestaShop store.

There are three different ways to back up your database:

• Ask you hosting provider to back up your database.
  Make sure that your database backup is functional, recent, and especially that it contains all of your data for your PrestaShop Store.

...or...

• Download a database backup from your PrestaShop back-office.
  Go to the the "DB Backup" page, then follow the instructions on the page.

  Info
  This page is available from: PrestaShop 1.4: under the "Tools" tab, in the "DB Backup" sub-tab. PrestaShop 1.5: under the "Advanced parameters", in the "DB Backup" page.

  This process will take between 1 and 20 minutes depending on the size of your database, after you will see a link appear on the page, titled "Download the Backup file (size)". Click it, and make sure this backup is functional, recent, and especially that it contains of all the data of your website. Open the zip file and make sure that there are absolutely NO ERRORS in the .sql file it contains before proceeding to the next step.

...or...

• Download a copy of your database via phpMyAdmin.
  Be sure that your database backup is functional, recent, and especially that it contains all of your data for your PrestaShop Store. If your database is too big, you might receive an error. If that is the case, you will need to contact your hosting provider.

Keep that backup in the "prestashop-prod" folder on your computer, which you should have created in the previous step and should contain your files.

Backing up Your Customized Translation

If you did not edit the available translations or add new ones (either PrestaShop's or your modules'), please proceed to step 2.

To save your translation changes:

1. Navigate to the "Translations" page in your back-office.

   Info
   This page is available from: PrestaShop 1.4: under the "Tools" tab, in the "Translations" sub-tab. PrestaShop 1.5: under the "Localization" menu, in the "Translations" page.

2. In the section "Export a Language" select the language to which you have made any modifications, then select your current theme, and click "Export".
3. Save the downloaded file into the "prestashop-prod" folder on your local computer.

Do this for all your custom languages, both those you created/added and those you modified/corrected.

Does the "prestashop-prod" folder contain...

• ...a complete copy of all of the files from your production shop?
• ...a complete and error-less copy of your database?
• ...a copy of your customized translations (optional)?

You have checked the entire backup folder, and made sure that they are all correct and that you would be able to return to your current version / restore all of your data.

If you answered yes to all of the questions above, then proceed to Step 2.

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