Open Windows Explorer in specific folder

Open Windows Explorer in specific folder

I'd like Windows Explorer to open my Dropbox folder whenever I open
Windows Explorer, instead of the My Documents folder.
To achieve this, I right-clicked on the Explorer icon in the task bar,
then again right-clicked on the Windows Explorer entry, then Properties.
There I changed Target to:
%windir%\explorer.exe c:\Users\myUsername\Dropbox
This works, but Windows Explorer opens the Dropbox folder in the hierarchy
Desktop\My Computer\C:\Users\myUsername\Dropbox
But I want it to open the hierarchy
Desktop\myUsername\Dropbox
If it opens My Documents (the default), it's that hierarchy too.
Any idea how to achieve this?