Command line commands for YacReaderLibraryServer

I am trying to get to the use YacReaderLibraryServer.exe in command prompt and trying to use the update-library command and I cannot figure out the correct way to type this command so it works. The closest I have got anything to work was typing the following:

C:\Program Files\YACReader>yacreaderlibraryserver update-library /CMC
Directory not found.

I cannot locate anything for help on how this works on the website anywhere. If anyone could be of assistance how these commands work it would be appreciated. Thank you.

Use the full path, e.g. c:\my_files\comics\cmc

Thanks. That worked, and adding " " to directories with spaces in them, work for that.