Unfortunately there is no 'them' - AFAIK the person who created the FSUIPC for X-Plane has not taken any interest in updating it for some years... I asked Pete Dowson (three years back) but he (understandably) was more interested in enjoying retirement than starting a new project. I guess we all know how that feels!
I'll just have to shut down PF3 and start it up again when it happens. Only a tiny inconvenience..