Icons used by the executable files are actually embedded resources inside the program file itself. It is not easy nor is it completely safe for your system to modify these resources.

Step 2: Whether a file or a folder, you’ll open the properties for it to access its icon. Select the file or folder and pick File > Get Info from the menu bar or right-click and choose Get Info.

The regular Program Files folder holds 64-bit applications, while "Program Files (x86)" is used for 32-bit applications. Installing a 32-bit application in a PC with a 64-bit Windows automatically ...