How do you use cheat engine 6.1 to work on virtual villagers 3

To hack Food: Firstly, look at the top left hand corner on cheat engine. There should be three buttons: one to save, one to open a file and one to open a list (a sign with a computer on it). Click the one with the computer on it. Scroll down on the process list and find 'virtual villagers 3'. Press okay. Now, look where it says Hex on cheat engine. There should be a long box next to it. Click in the box and type it how much food you have. For example: you have 224 food, type that number into the box. Next, just above it, there should be a button that says 'First Scan' . Click that button. A list of numbers (addresses) should appear. Then, on go back to virtual villagers 3. Make someone eat some food. Your food number should decrease. For example: i started off with 224 and now i only have 220. I would type in 220. Type in the number you have now, after a villager has eaten some food. Type it in the same long box (remember to delete the first number!), where it says Hex. Once you have typed in the number, click 'Next Scan'. Which is next to 'New Scan'. Do not press New Scan! Press 'Next Scan'. One address should appear on the left hand side. Double click on the address. It should appear at the bottom. Make sure it is highlighted in blue. Press 'Enter' on your keyboard. A box should appear saying 'Change Value to..' Change the value to whatever you want. For example: 100000. Look at virtual villagers 3, you should have that amount.
To hack Tech Points: It is the same way. However, instead of making someone eat from the food bin, drag a villager to the science table and make them research. So, you would type in the number of tech points you have first and click 'First Scan'. For example: 99. Then, drag a villager to the science table to research. Now, your points should increase. For example: Mine was 99, and now it is 102. Then, type in that value that you have now into the long box and click 'Next Scan'. One address should appear on the left. Double click it. It should appear at the bottom. Make sure it his highlighted blue. Press 'Enter' on your keyboard. Change the value to whatever you want. For example: 1000000. That number should appear on your tech points on virtual villagers 3.