As long as your Filerunner package is within it's expiry period you are able to add new recipients to existing packages. You can do this by doing the following steps;
​
1) Clicking "Sent packages"
2) Click the package you would like to add your recipient too
3) Click "Add Recipient"
4) Add your recipient's email address and complete the fields as if you were building a new package
5) Click "Send"