Related Downloads

[assemblytube]

Am enjoying using Downloads System Pro. I am not sure if I have missed a setting somewhere.

Is there a way of choosing which files are "related downloads"?

On my site the allocation seems a bit random as to what counts as related. Have I missed something?
Thanks for your advice.

[SMFHacks]

It's a fulltext search based on the downloads title

There is not a way to choose the related items.

[assemblytube]

Thank you.