Clicking on region selects all regions

hello - new to ardour, not to DAW’s but finding it a bit tricky.

I’ve separated out a bunch of regions on a track, and all was fine but I fear I’ve selected some option or somehow grouped the regions as now when I click on one region, the entire track is selected.

Also, say I want to export all 15 or whatever regions as separate FLAC files, what’s the quickest way to do that?

thanks in advance