I had this happen to me as well a while ago.
However, it (magically) disappeared some time after - I was using the (unreleased) dev version at that point, and it was present there and then gone.
So whatever it is, try verifying your files and re-downloading the mod, I don't think this is a "real" bug, provided just a few people are affected. In any case it hopefully should be gone with the next version.
But the strange thing is that your checksum is correct... hmm...
And btw I don't even think the mod does touch this decision, does it? Isn't it hardcoded?
Just found out that it fixes itself if the game is saved and then loaded again.