What difficulty are you having adding templates and Logos ?
Assuming you have download the files and extracted them to C:\ which will automatically put them in the correct directory, then when you are in teh PRODUCTS section you can use the pull down on the right to select your requirements as below
So, to start by adding a STB, CLICK (and hold) on the required STB and drag it to the socket you require, then release your left button on the mouse.
Do the same with the LOGOS as below by pulling down the logos
Again you Drag-N-Drop the required logo and when you release the left mouse button the above will appear