switch url's

Hello,

this is my first post on forum. Normaly i found solution in older topics…

here is my problem:

I have Multisite WP
i have 2 sites – English and Slovenian
English is on ginbrin.com
Slovene on ginbrin.com/si

I would like to make Slovene on ginbrin.com and vice versa

bottom line: i would like to switch url’s or sites…

any idea? as simple as possible 🙂

Thank you!!