I'm having the same or a similar problem, no google button shows up, and in payment options it lists Google Checkout, but there's no radio button beside it, if I try to click checkout from there without selecting the other radio button (PayPal) it gives the error that no payment method has been selected.

I've read the previous posts, but am confused because renaming YOUR_TEMPLATE to the template I'm using isn't possible, they're in the same directory. Putting the file inside the YOUR_TEMPLATE folder (called template) inside the directory of the template I'm using is what I did originally and that didn't work either, obviously.

Can anyone clarify this, it's driving me nuts.