Applied options, but stealts

For some reasons my backup NAS is down (grrh!) so, for now, my external HD is my backup repository. I use windows and I’m annoying by the letter driver problem. I read the manual and try to modify my backup jobs but… a very strange thing appen. If I set up a option in the “destination tab” the option is applied but I don’t see there, even if I restart the server.

Now, I have a backup with a wrong option, this option stop the backup process. How can I kick out if I don’t see this option anywhere?

my duplicati version is

Ok guys I resolved it. I export manually the configuration, edit manually and thanks to duplicati client update the configuration.