To avoid the ABCDIC issue listed here I'm trying to use directly the command line.
I hoped the -transfer on the GET command could make the trick, but with no success.
I'm sure the file exist in the default folder because I used copy/paste from the working Microsoft ftp script (i.e. type A get sx-liquidati-au)
C:\WinSCP>winscp /command "open ftp://isp:@184.108.40.206 -rawsettings ftpAccount=815" "get -transfer=ascii sx-pagati-au" "exit"
Connecting to 220.127.116.11 ...
Connected with 18.104.22.168. Waiting for welcome message...
Password: [I just pressed enter here]
Starting the session...
Reading remote directory...
Active session:  firstname.lastname@example.org
Can't get attributes of file 'sx-pagati-au'.
File or folder 'sx-pagati-au' does not exist.