I doublechecked that I picked the right one, DictIconFillColor is the value I used, which sounds right to me. In the file I uploaded it's changed from the default of 32 thousand something to 42 thousand something, but in the UI that basically looks the same as the original value.
For the flashcards that's pretty easy to reproduce:
- Install the dictionary
- Import the the export file I uploaded with Radicals set as the first dictionary to check
That will give you a new top level category called radicals with several subcategories; it should have 321 cards in it. I'm guessing that you can just export at that point (as XML) and it should reproduce. In the event that it doesn't I did do one additional thing, I created a category manually called 'Simplified', and threw the simplified radicals into that, so in my case I did have a few characters that were in two subcategories.