Calibre-portable default library directory

Hello all!

I use calibre-portable distribution under Windows 7. I have few library, which are located in different directories, e.g. "C:\libs\{lib1,lib2,lib3}"

I want calibre to open the folder "lib1" by default, so I symlinked

It works well, but I must have admin privileges to do this. Under *nix "ln -s" works too.

Is any other way to set default library path?

Thanks in advance, Denis.