Thanks Cornelia,
I've got both 4.2 and 4.3 saved, so easy to go back to 4.3. I wanted to see if I got the RX100 in the drop down list so tried 4.2. The RX1 is in the list on version 4.3, but not the RX100.
Mine doesn't detect on default, but if I select Sony from the drop down list and then look at lenses, I get the same as you are getting as the default. I do architectural shots so would like the full support for my specific camera with it's lens.
I'm aware that lens correction has nothing to do with RAW support but I initially had 2 problems - the other one being that LR was not recognising .ARW files. I only mentioned .ORF as I've previously had an Olympus and LR picked up all those files off my hard drive.
Any advice is welcome.
Thank you.