SOLVED
I'm having some trouble getting this going. I'm running a fresh install of KSP 1.3.1 with Kopernicus 1.3.1-2, Galileo’s Planet Pack 1.5.88 and then the textures added as per the instructions. When I run the game the loading bar reaches the end then the application hangs. The same thing happens in both 64 and 32 bit versions. Interestingly if I remove the folder ModularFlightIntegrator the game does load but none of the new planets do it's just the stock solar system.
KSP.log: https://pastebin.com/NqXMPUJ3
output_log.txt: https://paste.ee/p/boqZF
Any ideas?