The Matrix Online standalone-client

[standby]

There is, but my old (2007 backuped) client doesn't start at all - doesn't find network and crashes so I cannot check how it will crash from this command.
Command is in autoexec.cfg:

# Leave blank to run server-less. Otherwise give address of server.
# NetJoin ="hostname"

When and how it was been used still doesn't have a clue.

Edit:

I have tried with 7z client posted here.
It is written that commands in autoexec.cfg are replaced by launcher and has to be moved to useropts.cfg
I copied lines in useropts and tried all possible ways to start MxO - there is launcher starting and nothing more.
matrix.exe itself refuse to start - with explanation to use shortcut from installation (as I remember it was to launcher not to matrix.exe) so maybe here is dog buried... beta matrix.exe maybe was able to be started directly.