Last session I only was in the VAB and after adding an SSTU tank I wanted to resize it, I got a NaN inside the part's menu above the resize slider and the game became unresponsive, I had to kill the process. Logs: https://www.dropbox.com/s/v8hvm4jiv0nz5ip/2017-05-16-1 KSP.log.7z?dl=1