I came back to purchase another item, when I put it in my cart I was unable once again to check out. Lots of bugs just trying to make a normal purchase. Just want to point this out. Still waiting on license for social share too...
We acted on your support ticket and helped you to obtain your license manually. You should be able to download it now.
To be able to look at your issue with the "page not found" error when trying to check out your shopping cart we still would need the exact URL of the page when this error happens. The screenshot you sent with your support ticket does not show the url and you did not answer our question about the url. We also do not have any reports of other people for such an error in our shopping cart.
We are sorry you hit that problem and will do all we can to solve it.