PayPal Payments v1.4.8b

Hallo people !
I`ve just instaled Open Cart v1.4.8b. On this I will sell logos sources.
This will work like this : the client chose a logo that he like, go at checkout, pay with paypal and recive an e-mail with a download link. Can anyone give me some advices about how I can do that ?

I`m stuck at Paypal extension configuration.
There are 3 options :
PayPal Website Payment Pro
PayPal Website Payment Pro (UK)
PayPal
Wich of these I should chose ? How I should configure it ?

I`m sorry for my silly questions and my poor english but I really need to set up this !

Pro costs $40/month to use.
Just "Paypal" is the free one

I`ve selected PayPal.
Now when I buy something, at checkout is sending me at PayPal Sandbox.
There I can`t login with my PP username and password to pay.
I want that paymant to can be done with Paypal Acount, not PayPal Sandbox.
Any sugestions ?

Turn off test mode

Done. It`s works now.
I will continue tomorow the work for this shop and I wil post here if I will have more problems
Thank you for help