How did you use CoSMOS for the game have 6.4 but dont know what to do
It's pretty easy.
First, you need to launch the game and CoSMOS so both are running.
Alt tab out of the game, and in CoSMOS go to file->open process, and select dungeoneering.exe from the list.
Now, go back into the game and look at how much gold you have. alt-tab back into CoSMOS and put that number into the "value" field, and press the "first scan" button. You will get a list of memory values in the box on the left.
Next you need to go back into the game and change the amount of gold you have. You can do this by buying things, or by doing a dungeon. Once you are back at your guild, look at your new gold total. Go back into CoSMOS, type the new gold value into the "value" field, and press the "next scan" button. Repeat this step until only one memory address is shown in the box on the left. Double click that memory adress from the bbox on the left, and it will now be shown in the box at the bottom of CoSMOS.
Now, in that box at the bottom it should show description (it will say no description), the memory address, the type (4 byte), and the value, which is how much gold you have. Double click on that "value" field in the bottom box, and it will let you change the number to whatever you want. If you change it to 10,000 and then tab back into the game, you will see you now have 10,000 gold.
CoSMOS is an intimidating and insanely powerful tool, but much of what people actually want to do with it is relatively simple once you know how the basic functions work.