Hi,
I have to agree with you, the non-resizable softwares are a pain.
We are aware that the AFCC should have a responsive design, and we'll try our best to make it resizable in further versions.
Also, there were multiple technical reasons for this when we released the AFCC last year.
Still, you can note that there is a resize option in the top left menu, it's a scaling option and does not allow resizing it as you'd wish, but it will allow you to see the whole window at least.
I must apologize for this, and I can guarantee that we will try to improve the AFCC/MFCC UIs whenever it's possible.
Cheers.