I have just discovered Duplicati and am in the process of doing a first/test (local) backup.
While that is progressing I clicked on ‘About’ and then ‘Show log’.
On the ‘Show log’ screen the
General | Changelog | Libraries | System info | Show log menu is NOT displayed.
Firefox 61.0.1 on LinuxMint
Duplicati - 18.104.22.168_beta_2018-04-02
Thanks to all who have done the work.