I just lost my entire catalog of synced folders! How can I restore it from the most recent backup?

I was simply trying to remove one old folder of images that no longer existed. Shockingly, my entire catalog of photographs vanished!

I need to restore from the latest backup, which was yesterday. I need guidance to do this, lest I do further damage. Help will be much appreciated!

For now I am shutting LRC down until I know how to proceed.