After the last upgrade you gave me the choice to upgrade to paid version or continue using the ad-supported version. My first question was, "how much is the paid version". I still don't know. When I click on " upgrade to paid" in the settings it takes me to the play store. There is no price and where I would expect there to be a price it just says "upgrade". Uh, no... Not until I know how much. So, how much is the paid version?