Problems with DirectoriesMove

Hi everybody,
I have a problem with DirectoriesMove. I try to copy a directory from my stick to the hard drive.
It should be MyAppPortable\Data\MyDirectory -> "My Documents"

I tried it as mentioned on the site linked above.

[DirectoriesMove]
MyDirectory=%DOCUMENTS%

But this copies everything from "My Documents" to my stick. As a result I exchanged the two parameters.

[DirectoriesMove]
%DOCUMENTS%=MyDirectory

But now nothing happens...

Can someone tell my, what I did wrong?
And is it possible to copy the folder back after closing the Application?
Sometimes the application changes the files in "My Documents" so I should copy them after closing it.

It's ok for me, if this is not possible with the default PortableAppsLauchner. I can write an alternate launcher for that, but I prefer adding some entries to an ini-file.