I installed KSP on the Win 10 partition (before I used it under MacOS) and I installed the same mods I had before the update.
After some troubleshooting I found that the problem I was experiencing was caused by Scatterer. I removed all the mods and installed them back one at a time, until I found the one that was causing the issue.
Basically, the games loads correctly but when I start a scenario (any kind) data starts to increase in RAM at a rate of 250-300MB per second, until it reaches 32 GB (16GB RAM + 16GB virtual memory). The task manager graph indicates a steady rate throughout.
Upon filling up the memory, KSP crashes because of an access violation error (I guess no more addresses are available).
I can replicate the problem each and every time with scatterer installed (alone, no other mods that use it). If I remove scatterer, the game is perfectly playable.
What can I do? I would like to have those awesome graphics back!
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Edit: I seem to have found a possible cause. There was a png file missing in the "config" folder (in the log there is a series of "IsolatedStorageException: Could not find file" errors). Maybe the code could be changed in order to make sure that if a file is not found scatterer doesn't start an endless loop.