Tor Browser Network settings

I changed Network proxy by mistake. Now when I try to set it back to
SOCKS: file:///var/run/anon-ws-disable-stacked-tor/
PORT: 0 I can’t click OK if it’s set 0. I can set other number and it work.
How I can set it to 0 ? Does it matter if it’s 0 or 1 or 2 or any other number ?
I tried to redownload using Tor Browser Downloader but it didn’t help

you can change the port back to 0 by typing about:config into the address bar and search for network.proxy.socks_port. double click it can change it to 0