Ok, I see. It is part of an expansion pack, which I don't have.
Straight floats are floats without the amphib wheels. (I don't like those, but is apparently more "realistic" for beavers.)
Milviz DHC-2 Expansion Pack (Play n Spray)
https://milviz.com/flight/products/DHC2EXP/ I've decided to add this expansion pack to my MV Beaver, so download is in progress ...
(stand by)
... and I'm back.
I've got it installed and tested. I see what you mean. My plane's floats and wing leading edges are black as well. Looking at the folder for the new planes, I see the issue. Yes, the texture sheets for these models are different.
The original repaint will not work correctly for these expansion models.(at least the STOL float version I tested.)
This would be a new project for Klaus if he wanted to do it.