Hello everyone - it's pretty clear that our Milestone 4.6.0 patch on the Experimental branch is actually less stable than the 4.5.0 patch it replaced, so we're temporarily reverting the Experimental branches back to 4.5.0 while we work on some fixes. Apologies to anyone affected by these issues.
Please be aware that any 4.6.0 save games will not be compatible with the older 4.5.0 version, so players will either need to revert to an older save from 4.5.0 or wait for us to release 4.7.0 next week if they want to continue an existing campaign.
If you do want to continue playing 4.6.0 (and I wouldn't advise this given the number of crashes being reported), then you can still access it on the Experimental Legacy branch.