Hey :)
Elevation probably means that you need to run the patch as administrator.
Instead of running the patch try downloading the uncensored graphics directly from this link: https://www.dropbox.com/s/ypabk7agc9ek8ap/Diamond%20Mirage%20uncensored%20graphi...
Part1 of the solution: When you have extracted the zip file it creates a folder called "censored_graphics". Inside that folder are all the uncensored arts. We basically need to right click that "censored_graphics" folder and choose copy or cut.
Part 2: With the above folder copied or cut we need to open the game folder. It should be called something like "diamond_mirage_pc" and it might be located in another folder called "diamond_mirage_1_0_censored_pc". Once you enter the "diamond_mirage_pc" folder you will notice there's another folder called "game" among other folders and files. If you enter the "game" folder you will see more folders and files. We are only interested in the "censored_graphics" folder and we should paste the new "censored_graphics" folder that we copied in Part 1 there. Replace all files and all arts will be uncensored.