If you're referring to the Take Command window, look for the slider at the far right side of the status bar.
If you mean the console window, I imagine the utility you cite should work fine with TCC.EXE. (If it doesn't provide any way to change the name of the executable it starts -- shame! -- then you can just run TCC from the CMD.EXE prompt.)
Yes, I was referring to the Take Command window but just the console area background. The slider almost does what I want, but it makes the entire window transparent - the console area, the text, menu, title bar and all. I was hoping for something similar to the example I showed where only the background of the console window area is transparent with a blurry background(or not ). The text, title bar and rest are still solid. The blurry background is not so important for me. Basically, I do a lot of work on the console while rendering images in a background window. I'd like to keep an eye on the render while still working in the console.