I've updated to the latest atmosphere 1.5.2 and firmware 16.0.0.
But when I start tinfoil it says "could not start the software". I have installed the latest sigpatches!
I have tried multiple times deleting the tinfoil folder, downloading the tinfoil installer, and copying back to the sd card...
You need to make sure that your diablo game has the same Title ID and Build ID as the cheat code. You can check it with sxos, by going to cheat menu. From then, it's displayed on the right of the screen.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi