Currently the only program I know of that can upload to the Duet WiFi is SAM-BA. I tried the new version of bossac a few days ago but unfortunately it doesn't recognise the SAM4E.
Is the "Bossa port" visible in the USB port list?
kinda did the same thing with 7 in panel cause I was curious what it does, didn't know it would actual delete the whole file.
can you provide me a link of SAM-BA