How do i upgrade my Mavic Air2 smart controller to the latest litchi?

amazon apps on my smart controller reports all apps (Litchi) are up to date. app on controller is 4.19.0
Mission Hub - Litchi won’t export a csv file - says license validation required.
Perhaps someone could offer some guidance as to how to update the app on the controller so I can sync the license.

What happens when you tap on the Litchi-icon in the Amazon Appstore?

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Today, I was given the option to update (yesterday, not so much).
I clicked Get Update and everything worked as expected.
Able to sync and export csv.
Thanks for the insight and help.