Ah, I thought it was something new, perhaps offering a IDE built on modern tech. It looks like it's built on old Win32 common controls, surely with poor text editing features.
I wonder who's going to be the first to integrate something like VSCode in their dev environment.
The dev tools in the industrial automation industry are so depressing, luckily we have the excellent Ignition (from Inductive Automation) for HMI/SCADA development.