Below are the necessary steps to update the logo of your affiliate program:

1. From your account dashboard, go to Programs > Programs.
2. Find the program you wish to change the logo for and click the Edit button.
3. In the General tab, you will find the Program Logo fields where you can browse your files for the new logo and upload it. Please remember that the logo must be 150×40, 200×200, or 300×300.
4. Once the new logo is uploaded, click the Continue buttons and then click Save.