command line options

I want a link (launcher?) on my ubuntu 14.04 box to run LO in a directory that I specify without opening a specific file. I entered the "working directory" and the approved execution name (/usr/bin/libreoffice). Problem is LO comes up in, I think, the last directory that I used. How do I get it to come up the the directory I specify in the desktop launcher.

John

I think LibreOffice will always start to open documents in the path specified under:
Tools/Options LibreOffice/Paths/My Documents

a comple list of start options can be seen by entering:
'libreoffice --help'
on a shell-prompt