I have been playing KSP with no issue up to and including 1.3.1. (1600+ hrs). However updating to 1.4 the parts catalogue textures are not displaying, I just see a light blue silhouette in their place.
VAB Screenshot: https://imgur.com/a/zsckM
KSP.log file: https://www.dropbox.com/s/m4gkf7yivvtgv0s/KSP.log?dl=0
I have tried a fresh steam install with no mods and a new test save file with the same result.
I also tried the full zip download from the Kerbal store agai