Do you have Notepad++ and have you ever changed a xml file?
Here is where I would make the changes.
I would open "My 7 days to die game folder"/Data/Config/XUi_Menu/windows.xml with Notepad++.
"My 7 days to die game folder" above is in quotations because I don't know where your game is. I always copy my game to another folder to not screw up my vanilla game.
I would then scroll down to xuiGameSettingsBasic and xuiGameSettingsAdvanced.
I would add my settings to XPMultiplier and LootRespawnDays
See image below...
In XPMultiplier I woud add a , after the 300 a space and then a 900 (or what multiplier I wanted)
eg "25, 50, 75, 100, 125, 150, 175, 200, 300, 900"
In LootRespawnDays I would add a 1, and a space just before the 5
eg "-1, 1, 5, 10, 15, 20, 30, 40, 50"
Then I would save it and start my game You should then have those options unless you, I or both of us screwed something up...which is why I always say to make sure you put a safe copy of the file you are going to change someplace safe.
The image is highlighted where the changes (to me) should be made.
I have changed other things in this and it has worked. Like I have added 20 to the DayLightLength so the nights are not so long when I play 120 DayNightLength.
And am saying one more time so you can't miss it - Copy your file to a safe place before you change it!!!!!!!!
Someone please correct if you see any mistakes or if there is a better way to do this as I am also learning.
Good luck on your game.