issue with pay per view plugin

HI I think ive worked it out on how to apply to the content. But when you have paid the fee eg £0.25 then it takes you back from paypal to the website but it show the following screen (capture image attached) confirm 0.25 GBP payment to see content – can I chnage this? its not clear what they have to do? can I remove this button once they have paid? it needs to say click here to confirm ********* or taking out?

Also how do I change the color of the button I would like it blue button white bold text