Open your "File Browser", also known as "My Compter" or "Explorer" (don't confuse this with "Internet Explorer").
Then go into your "Documents" folder.

From here you need to go deeper down the folder hirachy as follows.
Go into "My Games" Folder.
Go into "TinyBrains" Folder.
Go into "QuadForceGame" Folder.
Go into "Config" Folder.
You should than see something like this.

Do a click on the file named "QuadForceGame.ini" with the right mousebutton and
choose either "Edit" or "Open with > Notepad".


Within the text editor, Notepad, find the line that looks like this:
Note: The numbers can be different.

And now remove everything within the line after the first equal sign.
So, it should now look like this:

Or in pictures:
Before:

After:


Now save the changes you made to the file.

If you now start / host the Game your friend can join again.

Have Fun.