If you're reading this, it means you've successfully unzipped the download zip from CodeCanyon.  At the root folder of this zip, you'll find Extension folder.  Once you've located this zip file, you're ready to upload it to your Magento store and upgrade the extension.

Best practice is to install update on development server first to test new update.
If you do not have development version - do files / database backup before install.

• Backup store files and the store database.
• Disable compilation mode in System > Tools > Compilation.
• Disable Magento cache - Cache Management
• Log out from magento admin panel ( if you logged in ). This step is required to reset magento access control cache

• Unzip extension package
• Navigation into package/Extension folder
• Upload content of package/Extension to your magento root directory overwriting existent extension files.
  • package/Magento1/Extension/app >> magento_root/app
  • package/Magento1/Extension/js >> magento_root/js
  • package/Magento1/Extension/lib >> magento_root/lib
  • package/Magento1/Extension/skin >> magento_root/skin
  • and so on
• Extension does not overwrite any magento core files
• Set correct file permissions for all the files which you uploaded to your server.

Now that the extension has been upgraded. You'll see version information at the bottom of your NWDthenes > Revolution Slider page.

If you have default PHP / Nginx settings, you might experience issues with slider import. By default max file size for upload is 2M. To update it you need to:

• PHP

  Update php.ini

  upload_max_filesize = 100M
  post_max_size = 100M

• NGINX

  Update /etc/nginx/sites-available/yoursite.conf

  client_max_body_size 100m;