Can you send me your errlog.txt file? This should contain error messages about what is happening, even if the program crashes. If you're using Mac OS X, it should be located at one of these locations within your Home folder:
From your errlog.txt file I see that you have a very old extension wandering around. i would suggest removing and reloading all your extensions. If necessary you may have to manually remove the files in the fmodules directory if the extension manager can't find them.
This line jumps out at me as an issue:
"name and version =CSV Importer Alpha 18 for MD2015=" (not IK Support)