There are two methods to update your theme.

Via Dashboard

You can update the theme directly from your dashboard if the license is active.

i. Go to your dashboard Appearance > Themes and click on the notification link to update the theme.

ii. Go to your Dashboard > Updates and update theme if update is available.

FTP Installation

1. Use your FTP software to browse to wp-content/themes folder.
2. Extract blogdesk-pro.zip and upload the folder.
3. Once it’s uploaded, go to your WordPress Admin, browse to Appearance > Themes.
4. Click the Activate link.