Updating Nordic Thingy:91 firmware

I am updating Nordic Thingy:91. I am following instructions on the web site:

I have updated modem using the latest firmware zip file. The nRFConnect for Desktop Programmer app successfully connects to the Thingy:91. However, the device does not work without also loading NB-IoT demo application firmware. The web page does not spell out which hex files to upload.

Below is a list of the files contained in the firmware update zip file. Which hex files on this list do I need to upload to the device to make it work?

thingy91_fw_2022-06-02_880c82db(2)
A CONTENTS.txt
I mfw_nrf9160_1.3.2.zip
| img_fota_dfu_hex
serial_Ite_modem_2022-06-02_880c82db.hex
thingy91_at_client_2022-06-02_880c82db.hex
thingy91_asset_tracker_v2_nbiot_2022-06-02_880c82db.hex
thingy91_asset_tracker_v2_nbiot_legacy_pco_2022-06-02_880c82db.hex
debug
thingy91_asset_tracker_v2_Item_2022-06-02 880c82db.hex
thingy91_rf52_connectivity_bridge_2022-06-02_880c82db.hex
img_fota_dfu_bin
L serial_Ite_modem_2022-06-02_880c82db.bin
L thingy91_at_client_2022-06-02_880c82db.bin
L thingy91_asset_tracker_v2_nbiot_2022-06-02_880c82db.bin
L thingy91_asset_tracker_v2_nbiot_legacy_pco_2022-06-02_880c82db.bin
debug
L thingy91_asset_tracker_v2_Item_2022-06-02_880c82db.bin
L thingy91_nrf52_connectivity_bridge_2022-06-02_880c82db.bin
img_app_bl
I serial_Ite_modem_2022-06-02880c82db.hex
thingy91_at_client_2022-06-02_880c82db.hex
I thingy91_asset_tracker_v2_nbiot_2022-06-02_880c82db.hex
thingy91_asset_tracker_v2_nbiot_legacy_pco_2022-06-02_880c82db.hex
debug
thingy91_asset_tracker_v2_Item_2022-06-02_880c82db.hex
thingy91_nrf52_connectivity_bridge_2022-06-02_880c82db.hex