I tried 1082 and I got the same result. So I tried 909 again.
Even though it does appear my .conf file was overwritten, wihout modifying it version 909 works fine. It scans on startup and I can connect to it with my Soundbridge.
Weirdly – even though the location of mp3s has reverted to /mnt/mp3, which is not where I have them, and the name of the server has reverted back to mt-daapd, which is not what I had it set to, my Soundbridge still shows the name of the server I was using and can still play the MP3s…