Upload files in your admin directory if you want to use the new system of storing campaigns.

OLD SYSTEM: When a new campaign is created the script will make a new folder, named as campaign name, inside of admin directory and a index.php file inside the new folder.
NEW SYSTEM: When a new campaign is created the script will not make the folder or index.php file because the redirect will be made using a ".htaccess" file and a single "index.php" file located inside the admin directory.

Before you click on "Successfully upload the files" button make sure that the files ".htaccess" and "index.php" was uploaded inside folder.