Safari crashing after update to Safari 10 on El capitan
I just updated Safari through the App Store on El Capitan. Now it opens for about 10 seconds and crashes just as it starts loading the pages.
I tried removing the new version of Safari with sudo and dropping in the last version (9.1.3) from a back up I made yesterday, but now that one behaves the same and crashes at start up.
I cant even re-download Safari 10 in the App store because it seems to think I'm up to date. Even after deleting any Safari apps from my Applications folder.
I put Sierra on an ext HDD to give it a try first in an attempt to escape any of this buggy stuff, but i'm getting it from a simple Safari update anyway.
I've searched google and it doesnt look like anyone else is having the same problem yet.
Anyone got any ideas?
MacBook Pro, OS X El Capitan (10.11.6)