Thats working Arno but i must give than more than 1000 subcategory in the list.
Yes, not a good solution.

I will add a new option for use all published subcategories for output...
By the way, i am not sure that your used category structure is the best way.
You has many sub categories with only one (or a few) downloads. As result has you a few thousand sub categories.
It is not better to move this in a few 'miscellaneous' categories?

Edit:
I see that i have not the last version from this module. Can you contact the developer dazza_dog for it and post it then here?