When a new update comes out, you’ll get a notification from Envato regarding the plugin update.
There are four ways you can do it:
1. From Installed Plugins Page
This is the easiest and the most recommended method
Just make sure your plugin is registered with the purchase code and then you can simply update the plugin from your installed plugins page, or WordPress Updates page just like other plugins.
2. Envato Automatic Updates
Envato provides a plugin for automatic updates, which can be found from this link http://envato.github.io/wp-envato-market You’ll find the other instruction on this page too.
3. Using WordPress Admin Panel
This is them most easiest way, but a bit longer. Head to your Plugins -> Installed Plugin and deactivate deactivate and delete digits plugin. After the deletion you need to upload the plugin installation zip file as a new plugin. Don’t worry, your data will not go anywhere, just the plugin files will get updated.
4. Using FTP
This method required FTP access to your server. Just head to your wp-content/plugins/digits folder and replace the files with the updated files.