To update the tConnect version, please, follow these steps:
Open the ‘Devices’ page,
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click the ‘Edit’ button on the desired device,
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click on the ‘Version’ drop-down and select your desired version,
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Save your choice.
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After an hour you will get this notification, that the tConnect wants to install an update. You can speed up this process by force-stopping and restarting the app.
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Press the ‘Install’ button and the tConnect will be updated to the same version selected before on the edit page.
To edit multiple devices at once, you can use the ‘Bulk Edit’ button at the top. You can follow this article How to edit multiple beacons at once?.