First and up front, praise to the devs who made this amazing tool...
I really thankful for the first steps in a fully supported dx12.
Nevertheless, Im sharing the same problem (as any other users) with ROTTR dx12. failing to compile, invalid flags in every effect I activate
However i managed do play with success SOTTR with dx12 although I get a error and a forced exit if I try to adjust settings or add a new effect in game. Im running a ryzen 7 2700 RTX 2070 winpro v1809.
I had the same error message on a RTX 2070 (DXGI_ERROR_DEVICE_HUNG) when trying out sottr. But the commits from the last couple of days fixed that. Maybe wait for the next release and see if it works then.