Wing FTP Software

Hello. I am a new user of FTP Rush 3.5.4 (downloaded from macOS App Store). I have configured my FTP server and I am able to connect to it via Mac Finder and FTP Rush. I am also able to write files to locations on the FTP server. The problem comes when I want to transfer a file (any file, not necessarily the one I originally transferred) back to the local directory. How do I make this work properly?

Transfer to FTP Server:
T][FTP]Status: Connecting to 192.168.4.138:51283
[T][Local-->C64-Ultimate-Founders]Status: Transfer Test.cfg Successfully
[1][FTP]Status: Start List directory /SD/Configs/ ...
[1][FTP]Status: Connecting to 192.168.4.138:51284
[1][FTP]Status: List directory /SD/Configs/ Successfully

Transfer from FTP Server to Local:
[T][C64-Ultimate-Founders-->Local]Error: Invalid server file path: /SD/Configs/Test.cfg.
[2][Local]Status: Start List directory /Users/richard/Library/Containers/com.wftpserver.ftprush.mac/Data/tmp/ ...
[2][Local]Status: List directory /Users/richard/Library/Containers/com.wftpserver.ftprush.mac/Data/tmp/ Successfully

OK, the latest version of FTP Rush is v3.6.6, please download it from our website: https://www.wftpserver.com/download.htm#ftprush

Please also ensure you have read/write permissions on the local folder.