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nRF52840 Dongle Not Responding

Hi,

I'm using the nRF52840 dongle. Using nRF Connect v2.5.0 - Programmer (experimental) tool, I've downloaded the following hex files:

softdevice_s140.hex,

ble_app_buttonless_dfu_with_bonds_s140_with_setting_page.hex, and

bootloader_secure_ble_debug_with_bonds_s140.hex

Now my dongle in not recognized by Windows 10 Device Manager and I can't do anything with it.

1. Is there a way to recover/revive this dongle?

2. What combination of hex files do I need to download in order to get basic BLE functionality?

Thank you!

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