Vessel crashes, KSP freezes.

[LittleBitMore]

KSP has been frozen for the past 15-20 minutes. I'm in an RP-1 1.7.3 save.

I built the vessel depicted here  https://github.com/KSP-RO/RP-0/wiki/first-launch-tutorial and launched it. It broke the Karman line and got to about 141km (attempts before using the tutorial managed about 5km). It went down, nearly disintegrated, and upon hitting part of Florida's peninsula, the game froze. it's playing the air whooshing sound you hear when going extremely fast, and Windows is throwing a "KSP.exe is not responding" yada yada yada, and the screen is slightly white.

Is there any way to fix this without closing KSP? I don't think that'd be the best thing for my save, and I'd have to relaunch the Ozzy 1.

And is there a specific cause for this? A clashing between two mods, or maybe just high memory usage? Are there any logs I should put here?