Email us at firstname.lastname@example.org
from the account that matches the one you use for PayPal (or forward the PayPal receipt) and we'll sent the file with instructions on how to add it.
We'll also need to same version you of the package downloaded. Select one of the spreadsheet files, right click, properties then tell us the file type, it will be one of (.xls, xlsx, .ods).
I'll join this thread to one with the instructions in. There are some preparation steps you can start on to ensure your accounts 'balance' before you start.