How do I move multisite from sub-directory to root?

Hi there!

So I have installed multisite in a sub folder
(mysite.com/mysite/), but it's causing me all sorts of confusion (e.g. when I try to go to Network Admin, it goes straight to mysite.com/wp-admin/network, it's not going to the subfolder).

Is there any easy way to fix this, or should I just move everything to the root?

Also, will the wpmu multisite plugins work if installed in a subfolder?

Thanks!