If you've upgraded to Kopernicus 1.3-5/6, GPP 1.6.1 and Sigma Dimensions 0.9.7 to play in a rescaled system and the game crashes on load, I'm pretty sure the issue is Kronometer. I removed all my mods, kept only GPP and its dependencies, Dimensions, RESCALE, and Kronometer, but the game still crashed. So I tried various permutations with and without the scaling-related mods, and leaving Kronometer out solved the issue.