Once you purchase the theme, you can enjoy the lifelong free updates. Every time we release a new version, you will receive an alert email from the Market. Then you can go to download the new version of the theme from the market website.
If you changed the code in the theme, please have the code backed up before the upgrade. And there are 2 ways to upgrade the theme.
Step 1. Login WordPress dashboard of your site.
Step 2. Go to Appearance > Themes.
Step 3. Switch to an any other theme.
Step 4. Click the Theme Details, click the Delete button in the lower right corner of the pop-up box. Do not worry, your content will not be lost!
Step 5. At last, you need re-upload and activate the new version of the theme.
Step 1. Use FTP software to login to your website.
Step 2. Go to …/wp-content > themes.
Step 3. Unzip the dng-theme.zip.
Step 4. Upload the dng-theme folder to your server, overwrite all the files according to the prompts.