I'm currently using Nexus Mod Manager to uninstall Master Shapeshifter, because it conflicts with mounted combat.

However whenever I try to uninstall with the manager, the manager crashes and gives a "Nexus Mod Manager has stopped working" error.

The mod has a lot of files that would be very inconvenient to uninstall manually. Is there a reason for the crash?

The Nexus site is currently down for maintenance, they're adding a bunch of improvements to the site. Could that be related?