Dear Maintainer,

If i click with the right mouse button on one of those folders (either from the
parent folder or the folder themselve) i expect to see the "Restore Missing
Files" item on the context menu, but that item is missing.

By looking with strace it appers the extension is loaded:
marco@lilith:~$ strace nautilus -q 2>&1 | grep deja
stat("/usr/lib/x86_64-linux-gnu/nautilus/extensions-3.0/libdeja-dup.so",
{st_mode=S_IFREG|0644, st_size=18272, ...}) = 0
openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/nautilus/extensions-3.0/libdeja-
dup.so", O_RDONLY|O_CLOEXEC) = 13
marco@lilith:~$

I have the same problem.
I noticed today that the option does appear while the backup is running. As
soon as it's done, the option disappears again.

Marcin