The thing is upshot doesn't seem to trigger if portion of the screenshot is selected. Capturing the whole window works though.
Edit: someone has opened a github issue for this https://github.com/fwenzel/upshot/issues/28
Edit: someone has opened a github issue for this https://github.com/fwenzel/upshot/issues/28
I'll also need to add automated updates soon, or I can't notify people of updates ;)