Used this for a year until switching to monthly payments... which are apparently broken. Worked fine the first month after my yearly subscription was switched to monthly. After the second month, the app downgraded, says it's linked to another Google account, and has been denying access to my paid features I was charged for since the last billing over a week ago. I loved the app until this--would've gladly switched back to a yearly plan if my account hadn't broken from YOUR error. Fix this.