Yesterday in the second Trafalgar match, I was one of two ships left in my fleet (What do you expect? We were the French). I had full health and was planning to take at least a few down with me, when my controls locked up, and the game quit responding. I had to force quit. I tried to rejoin, but as soon as I got back in, everything locked up again. Finally I just quit, and restarted my computer.
After that I could get back in the main lobby, and join other games.
I didn't know about the crashsender, but next time I'll use it.