Move the "Silence Between tracks" field

On first use of the software, when trying to merge several tracks into a preview, the software would not allow me to set a number in the "silence between tracks" field. After tinkering around in the software, I found the "merge output" tick box, and realised that after ticking this, I am now able to set a number in the "silence between tracks" field.

I would suggest that the "silence between tracks" field, should be directly next to the "merge output file" tick box. Despite that it might not take that long to work this out anyway, it is always a good idea to keep things as intuitive as possible.

Also, perhaps it might be a good idea to have two tick boxes, where only one can be selected, and these tick boxes could present the following choices:

MERGE FILES TO SINGLE OUTPUT
or
MAKE INDIVIDUAL OUTPUT FILES