Locate the msaccess.exe file on your computer (using Start, Search).
Depending on version you'll
find it in something like the C:\Program Files\Microsoft Office\Office
folder.  Right click the file, choose Send To, and the Desktop as shortcut.

Go to the desktop and you'll see a shortcut.  Right-click it and choose
rename and give it a more meaningful name.  Right-click it and choose
properties; on the dialog that opens you'll see a textbox called 'Target'
with the path to msaccess.exe.  Click at the end of that and add
"path to mdb" /wrkgrp "path to mdw"

substitute "path to mdb" with the path to your mdb file and "path to mdw"
with the path to the workgroup file that you used to secure the database
with.