I am using JSGME the same way I did in 1.2.16 and have had no problems. I remember in one of Wagg's live streams he said the folder structure was not going to change. If you already have JSGME just change the path to DCS World OpenBeta, do a new snapshot to be safe and let the good times roll. As a side note, this mod seems to have eliminated the shimmering and shadow flickering of trees that I had with the default terrain textures.