New board
Unfortunately not so, the only options are what to install and where. No mention of retaining or overwriting saves or logs. The other builds didn't either btw.
Oh dear. I've just installed this build over the previous one supplied and it's removed all my previous saves. This didn't happen when installing the 28338 build over the 28213. Luckily I had my latest save backed up in a bug report. Anyone installing may want to do likewise.