Changing from subdomains to subfolders

Hello everyone,

i can’t find a solution for my problem – i installed a networked and followed all the instructions. I didn’t get an option to decide if i want to use subdomains or subfolders, and now i have subdomains installed but it doesn’t work well.
I tried to find a way to change my network to use subfolders but i only found articles about doing the opposite. There seems to be one article that shows how to do what i need, but it’s an old one and the URL is broken ??

So, is there a way to change from subdomains to subfolders?

Thank you!
Maya.