Evernote has updated the Mac version of its popular note-taking app with the ability to quickly switch between multiple accounts. The new feature is only available to premium users, and lets you switch between one free account and an unlimited number of premium accounts without having to sign out and then sign in again. Additionally, there's now also LinkedIn integration, letting you share notes on the network, as well as some new keyboard shortcuts and stability improvements for users on both Snow Leopard and Mountain Lion. You can grab the update from Evernote's site now, as well as the Mac App Store — and App Store users will also finally receive the previous update, which includes support for Retina displays.