I've been trying to get your sysop util to work with Manjaro. It uses systemd instead of init.d.
So, when I try and change to name to synchronetbb.service in /lib/systemd/service, it doesn't work.
Mainly because it is not a service program.
Is there a way to start it manually?
Only the startup scripts require that, so I suggest you just set your own script to start up the "startsynchronetbbs" script bundled. That is all my startup script does at boot time. You should be able to use "smc" without changes though you won't be able to use the #1 and #2 options.