I’m not sure if the Snipping Tool is able to capture stuff that’s running through a DirectX pipeline. I know it cannot capture stuff from a video player, for example. You need something that can actually capture individual video frames for that.
However, there’s an even easier method than the PrintScreen + Paint variant, l because Stonehearth is a Steam game. And Steam can take screenshots.
While ingame, press the Steam screenshot key. (Mine is F12, but I’m not sure if that’s default or if I’ve remapped it.) You can take as many screenshots as you like while the game is running.
Later, after you quit the game, Steam will pop up into your face going “hey, you took these screenshots, wanna upload them to your Steam pofile?” But in that window is also a “show on disk” button, or something to that effect. Press it, and you get a file explorer window where all your screenshots are waiting for you! No need to fudge with Paint.
However, that folder is a temporary one, so better copy them somewhere else. After that, you can tell the Steam client to “delete all” if you don’t want to upload the screenshots to your profile.