Step 1 – Click to Begin updating plugins the top of the page.
Step 2 – If you translated the theme and the language files are in plugins/your plugin name/ lang/(EX plugins/Martfury Addons/lang), you need to upload them to wp-content/languages/plugins/. If not, After updating the plugin, any customizations to the theme’s core files, such as PHP files, language files will be lost.
Step 3 – Click to update button. All your content such as pages, options, images, and posts will not be lost or erased by doing this. However, any customizations to the plugin’s core files, such as PHP files will be lost.