No, you can't use the same application twice, because it's configured to use the default port (21) for FTP. You can use it next to another application that allows you to change the port of the FTP server. For this operation you can use FileZilla FTP Server, then you can change the FTP port to (24) because 22 is for SSH and 23 is for Telnet. Access the official website to download the application.
Note: the FTP Server is compatible with every FTP client released on the Internet.
