As no one's mentioned it...
The checkboxes on the "Warning: Files will be renamed", and on the following "Double-check" nag screen(s) to disable "Show this warning again" do not show in Windows 10 build 17035
(I don't know if any other checkboxes were missing - there's a lot of checkboxes in BRU)
Good news is that MS has fixed this in Windows 10 build 17040 -
"We fixed an issue resulting in checkboxes being missing from certain win32 apps. "
-Tom