what is the exact version of the GPL that greenshot 1.3.301 is licensed under?

I cannot download SW on my computer system without approval from our company legal team, and I cannot get that approval without knowing more about the license terms. The website only contains a general link to info on the GPL, but doesn’t state which of the GPL versions apply to the latest version. Please advise. Greenshot’s ticketing website for support won’t allow me to create new tickets despite having an account so this seemed like the only way to ask. Perhaps someone with a copy of the latest SW can view the license and tell me if it is GPL 2.0, 3.0 or whatever it is.