RefCurv 0.4.3 is now available for Linux. You can find the new version on Github:
https://github.com/xi2pi/RefCurv/tree/refcurv_linux
One new feature is the residual diagnosis:
After a GAMLSS model has been fitted to data, analyst can open a diagnosis window, which shows the Q-Q plot, Worm plot, Density estimate and residual distribution. Further diagnostic tools are under development.