FTX Central reports P3D V1 and V3 but I only have P3D V3 installed ?

Folks,

This isn't a major issue but when I start FTX Central it asks me to select a simulator: P3D V1 or V3. As far as I know, I only have P3D V3 installed (V1 was uninstalled a long time back and I think I've done a full rebuild since then). I suspect that I have inadvertently installed one of my old FTX sceneries in the V1 format (i.e. before the quad installers) but can't figure out how to find out which one it is. If I run FTX Central for V1 of P3D it shows many of my (I believe) V3 sceneries.

This isn't stopping me doing anything and doesn't appear to be creating any conflicts. The only real reason for looking into it is that my P3D SSD drive is getting rather full (238Gb of 250Gb) and I can't realy splash on a new SSD any time soon so was wondering if I had some scenery installed that I could take off to get a little more space on the drive.

Any clues would be most welcome.

Thanks,

Rob