Thanks for the commandline export - that all looks OK to me (ignoring likely re-formatting issues like the triple-dash before send-mail-url).
It looks like the argument exception may be a common problem with 2.0.2.9 - if you can’t wait until we hear from @kenkendk you might want to consider downgrading to 2.0.2.8, which seems to have worked for some people.
Out of curiosity, does it work any better if you change “C:\Work\” to “C:\Work\” (just add another slash after the colon)?