Should I unroot before installing latest OTA update? topic

I've got a Nexus 5 with Android 5.0. I've had it rooted and unlocked using SkipSoft Unified Android Toolkit. I recently got a notification for an OTA update for 5.0.1. When I tried to install it, it downloaded ok but upon restarting it dropped me into teamwin recovery menu with options for: Install, Wipe, Backup, Restore, Mount, Settings, Advanced, Reboot. Not knowing what to do I clicked on Reboot -> System which booted back into the phone. Nothing changed or got installed.

Does anyone know how I can apply the latest OTA update? Do I have to unroot first, apply and then re-root? Does the Toolkit have support for 5.0.1 rooting yet?

TIA