Can't get Photon working again, not used for some time v0.6.2 firmware

Troubleshooting
1

Hi,
Tried to update the device’s Wifi credentials by putting it into listening mode, but would not work using the app.
Trying to put it into dfu mode to reflash but that doesn’t seem to be working either. I get the following error:

! An error occurred while attempting to update the system firmware of your device:

Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
Error during download get_status

I’ve updated particle-cli to latest version.

Output of particle serial inspect:

Platform: 6 - Photon
Modules
Bootloader module #0 - version 2, main location, 16384 bytes max size
Integrity: FAIL
Address Range: PASS
Platform: PASS
Dependencies: PASS
System module #1 - version 1000, main location, 262144 bytes max size
Integrity: PASS
Address Range: PASS
Platform: PASS
Dependencies: PASS
System module #2 - version 204
System module #2 - version 1000, main location, 262144 bytes max size
Integrity: PASS
Address Range: PASS
Platform: PASS
Dependencies: FAIL
System module #1 - version 1000
Bootloader module #0 - version 7
User module #1 - version 5, main location, 131072 bytes max size
UUID: 64768665242E339B00885DEB2A902B4E230CFC2EF5755783A13BF5C12A2FC44E
Integrity: PASS
Address Range: PASS
Platform: PASS
Dependencies: PASS
System module #2 - version 1000
empty - factory location, 131072 bytes max size

I’ve attempted particle flash --serial bootloader-0.7.0-photon.bin but it doesn’t seem like anything happens.

I expect to see the line “sending file: bootloader-0.7.0-photon.bin” but nothing shows.

Similarly, when in DFU mode, and running particle device doctor, nothing happens after I press enter after continue.

Another try:
particle flash --usb --force c:\particle\bootloader-0.7.0-photon.bin:
Error writing firmware: Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
Error during download get_status

And nothing further happens after this:
particle flash --serial c:\particle\bootloader-0.7.0-photon.bin:
! PROTIP: Hold the SETUP button on your device until it blinks blue!
? Press ENTER when your device is blinking BLUE

2

What does particel serial inspect report after updating the bootloader?
You can always add the -v (verbose) switch to the flash commands to get some more info about the process.

What does particle --version report?
It may be that you have multiple instances of CLI installed and updated the "wrong" one.
Currently the latest version is 1.38.0

I'd download the latest official bootloader binary and
flash that via particle flash --serial bootloader-1.0.0-photon.bin -v
and then in DFU Mode run particle update -v