Hey guys, I run a few servers and when I do updates for my servers I usually just download the update and let it do a full install then run the server once not on my server pc just to set everything up (yes this will make a new `world` folder but thats okay) then just delete everything in the existing server folder which has the world you want to keep EXCEPT THE WORLD FOLDER! then just copy over the new updated server but leave the new world behind and then boom its done.
If you need more help feel free to dm me or find me on discord for help anytime!