Since checking the logs is the first step in debugging any problem, i think a button “Open the Settings folder” should be added somewhere (in a settings page maybe?).
Note that i haven’t used web-ui at all, this is just what i think after reading a lot of threads in which we always have to tell everyone the path (~/.duplicacy-web/) where the 
settings folder is.
Having a button which opens that would be helpful and faster. (i’m making the assumption here that all the relevant files and folders (config, logs, filters, etc.) can be found in the same “settings” folder).
