is currently difficult, as most modern developments are either focused on X-Plane 12 or other simulators. However, there are a few notable projects and alternatives to consider: Current & Upcoming Options SkyCatsLab ATR 72-600 (Upcoming)
that many users prefer over older payware due to its updated community support. Comparison for Context For those also using Microsoft Flight Simulator ATR 42/72-600 Expert Series atr 72600 x plane 11