can someone please show a way updating my wallet to the latest...i mean i just need to replace the wallet.dat file??or is more complecated??and i want also to setup 12 masternodes !! can this be done by me on windows just following the guides or i do need help?
You have this kind of money and lack of basic knowledge about crypto?
No offence but gain some
i bought dark on early days and i holded them until now without selling on the first peak as i said i have some experience and i think i can handle things but i allways ask to confirm because as i said im not an expert on the field..im better on investing than developing

Few post above, you have nice guides how to set up a MN. You need to face it on your own or ask others to set them up for you for fee