@OP well,
I reinstalled today.
But today I was buying Alien Organisms and the sliding bar always allowed me to buy 1401 (With a miner). and would obviously crash. But than if I buy only 1398, it won't crash (at least not that often). I have only noticed this after making 3 or 4 runs.
The thing is that most of the times I don't even look and just fill the cargo.
Although this may be a reason, it does not justify crashing when I sell looted guns.