How to upgrade Zen Cart 1.3.9 to Zen Cart 1.5

Today i will guide you How To upgrade Zen Cart 1.3.9 to Zen Cart 1.5, You can follow the following steps one by one.

1. Before upgrade Zen Cart First of all you need to take Backup your existing Zen Cart 1.3.9 website by logging on to your Cpanel > File Manager of your cpanel you need to select all files and need to compress all the files and save them in a zip files
2. Once the backup of files is done Now you need to take backup your mysql database, for this go to phpmyadmin in your cpanel hosting and then click the database name on the left and then click export to export the database dump.
3. Login to your admin and make a list of all the modules that are installed like shipping modules (ups/usps), image handler etc in a notepad file or you can also take a screen shot of all the modules which you have installed.
4. Next step is Download the latest zen-cart 1.5 from zen-cart.com and then using ftp upload the zip file to your public_html folder. Extract the zip file to your desktop as well for later reference.
5. Using File Manager again, select the zip file and then click extract to extract the files in a folder e.g /newzen
6.  When you will extract the zip file, it will create another folder "zen-cart-v150-full-release-12302011"  inside newzen so open that folder and then select all the files and move them out of this folder to /newzen folder.
7.  Now create a new database by going to phpmyadmin and then click import to import the database dump that you exported before, mysql database of your Zen Cart 1.3.9 website (Step 2)
8. Extract your Zen Cart 1.3.9 backup files and then edit Zencart 1.3.9 backup folder/includes/configure.php and update the path, database name, database user and password and then using ftp upload it to public_html/newzen/includes folder. Similarly, edit the admin configure file by going to Zencart 1.3.9 backup folder/youradminfolder/includes/configure.php and upload it to your public_html/newzen/admin/includes folder
9. Copy the images folder from your 1.3.9 backup folder and upload it to /public_html/newzen
10. Now go to http://yourdomainname.com/newzen/zc_install and then choose "Database Upgrade".  If Database Upgrade option is not there, then you will have to look at the configure files as the installer was not able to connect to the database.
11. Delete the zc_install folder and then rename the admin folder. When you rename the admin folder also update the configure file (youradminfolder/includes/configure.php)
12. You may have made many changes to your languages folder so use the tool (WinMerge) to compare the zen cart 1.3.9 backup folder with the zen cart 1.5 folder and note the files that are different. You may have installed custom template so there will be extra files as well. So copy the custom template folders/files to the new upgraded store.
13. Re-Install all the modules (Shipping/Payment) and other modules that you had on your old zencart store. (All mods may not be compatible with the new version)
14. Test everything.
15. Now move your Zen Cart 1.3.9 files from public_html folder to /oldsite and move the contents of /newzen folder to the root and then update the configure files. And if you had the zencart in a folder then rename the newzen to store or catalog.
16. You are finally done with the upgrade of your zen cart store.