Enabled generate navigation only around envokers and destroyed project

My fault I know. I enabled “generate navigation only around envokers” while trying to fix an annoying issue where VR teleportation skips to 1st floor level and back to ground floor all the time.

Doing that has now destroyed all VR navigation in the project. I purposely didn’t save the project and closed it immediately but it seems that setting breaks everything whether you save project or not.

My question: How can I reverse this setting now? I unchecked it and didn’t save the project but now don’t know how to reverse whatever it’s done.

Thanks