With the help of the link, How Do I Install/Upgrade/Uninstall Quick Update Translations AppExchange App? you can easily understand how to install/upgrade/uninstall the app from the AppExchange.
P.S. Discover Quick Update Translations, the simple way to update Labels and Translations in just a few clicks. Find it on AppExchange: https://appexchange.salesforce.com/appxListingDetail?listingId=fa9afbfe-74ff-4027-ac32-2cdfd58184d3