Where does WebMatrix store the site path informatiom?

I have a local Wordpress site installed via Webmatrix. I would like to change the path directory but cannot find the file where WebMatrix stores this data. The site is working properly but I do not like where the web site files are located.

E.g.: currently my website "Test" ist stored at location

 I:/Test/Wordpress/Test

 and I want to change that simply to

 I:/Test

Just relocating the files themselves does not work because WebMatrix still points to the old folder.

Thanks for any help.