If you have Difficulty in Paying – payment methods during checkout or entering details like country state, address –

BEST way is to Select EXPRESS CHECKOUT (Paypal yellow button) and complete without signing up.

Still you will be able to download the products instantly after paypal express checkout.

Paypal Express / Quick Checkout – Orange Button instead of view cart or checkout page. (At Left Column, you see Cart Icon at top, click that and then Checkout within that)