Login to your Glow account.
Once logged in, click on Clients from the main left hand menu.
The Clients screen will load the Live clients tab from the inner menu automatically. Click on the name of the client for whom you want to update multiple themes.
You will now be shown the client area. The client’s name that you clicked in Step 3 above will be shown as the main heading at the top and the inner menu will load on the WordPress tab by default.
From the tabs along the top of the WordPress screen, click Themes.
Here you will see a list of all the themes on this client’s website, in alphabetical order.
If an update is available for any of the themes, you will see it represented as so:
5.6 –> 5.6.1
This indicates that an update of the theme is required from version 5.6 to version 5.6.1.
To begin the Update process, click on the checkbox to the left of the version number for all of the themes that you’d like to update.
Having clicked on the checkboxes you will notice that the Wait and Update buttons in the bottom right corner are now clickable.
Click on the Update button.
The information bar will flash subtly for each of the themes that you selected as the update is in progress and once it’s complete, you will see a note that says Up to date next to each of them.