The plug-in uses the YafaRay source code available in the end of 2019 (not sure it was exactly v3.3.0).
I'll make the plug-in evolve with YafaRay new versions, but for the moment, I prefer to wait for the YafaRay developers answer for my request about equirectangular images support. We never know, we could have a nice surprise as they work on YafaRay again.

By the way, Cecilia, I love your renderings [:)]