@guywinslow
Ok - that's good news but a mystery as to why it did not work the first time, as I assume you, effectively, just reinstalled from github.
If you had used the version I posted yesterday - there would have been a duetBackup ONLY log created (along with additional debug information) that you could access directly using the DWC UI.
The version that I sent to you yesterday will be the version posted in github soon. I do not use github for "in progress" builds - just for version bumps, once they are tested.
While I have tested on my 3.6 beta build - It would be very helpful if you could validate it against your 3.5 build.
Can you do that for me? I.e. Try the version I posted yesterday.
P.S. The permissions dsf:dsf from the ls -l look correct - so there may have been some other issue.