Basically after every update, my HUD returns to the default DB HUD, which is pretty crappy if you ask me.
I only have one line of code in the .ini file that moves my HP bar, everything else is in a good spot.
Does anyone know how to keep the HUD custom or will I have to copy paste code after every update?
The only solution I can offer you is to beg and plead the devs for an in-game HUD editor.
No but seriously, devs pls.
I have no idea why some people have this issue, I don’t have HUD switched back to original even when I un- and then reinstalled DB ._.
Is it possible that file location matters? I always edit ShooterUI.ini in location Documents -> My games -> UnrealEngine3 -> ShooterGame -> Config. I heard some manage to edit HUD by editing some files in the Steam directory, are you doing so?
gg2ez is 100% right though, if couple of fellas manage to pull off a decently functioning HUD editors on their freetime it shouldn’t be that big of a cake for dev team that gets salary from the title 
Have you put the ShooterUI to read only?
If you do not the game resets it every time you start.
Also, you could have a look at my Steam guide if you have trouble using the HUD generator. 