How can I export multiple spritesheets at once?

I have an Aseprite file with a bunch of different animated separated with tags in it. I want to export each tag as a separate png spritesheet. However, I can only seem to make it export as a single spritesheet with each tag separated on a new row, which isn’t what I want.

I found something that sounded promising, putting “{tag}” in the filename to get this result - but this doesn’t appear to work in 1.2.20.

I think that can only be done via the command line. Documentation: