I would like it if the "download invoice" and the "download receipt" buttons were again made to actually do something
Some websites, and yours previously, have buttons like these which, when clicked, do what they say they do instead of being just graphical elements designed to make the page look pretty. This is actually a useful service, and in the event I had a dispute with the person I am paying through your service, I wouldn't have to dredge through my bank records to show they received their money, or that you did and didn't give it to them. Of course, if that is actually your plan, it does make sense to omit this service, since it might take us longer to figure out what is happening. BUt if you are an honest company intending only to make whatever percentage your users agree to, having a service like this seems like a no-brainer.