On Windows 7, this can be done as followed. (Instead of browsing to the folder, add the IP address Goodreader shows when you open Wifi-Transfer) How to Map Network Drive in Windows 7?
2) To initialize the data transfer, open Goodreader and click on the wifi symbol at the bottom to start Wifi-Sync. Than just do the rest from your computer. You can copy files/folders directly into the Goodreader subdirectory, as it behaves just like a thumb drive.