Let me elaborate on this:
(Optional, but recommended) Set your dedicated server to use its own directory. (if you don't do this, it will use your current BL directory) Add this parameter to the end of your shortcut's target: -profilePath "C:\path\to\server folder"
It is recommended that you use a separate folder so that you don't have two Blockland copies running on top of each other. It does technically work, but it can be very confusing.