I have exactly the same situation as Loris.
I have a folder that I want to make an encrypted backup elsewhere. I thought that the only thing I needed to do was, in the original computer, go to Sync UI select encrypted folder and then select the folder I want to backup encrypted elsewhere, but then I read Destination (?!) folder not empty. Add anyway?
Destination!? no!!! Source!!! And now Computer 2 sees no encrypted files of the original folder! Only when I add a new file to that orignal folder will I see an encrypted file on the folder on computer 2!
This is odd. Are we doing something wrong?
Please help!