I have come to a situation where I have an image in Gimp with multiple layers. Now, I want to export every single layer as an individual image (PNG format preferably) automatically to a folder somewhere.

Is this possible?

The long method: Hide all layers except one, crop the section you want, export image. Hide saved layer, unhide another one, crop section, export. Repeat. Kinda cumbersome for an image with about 20 layers.