The software has lately changed from bad S3 to probably worse S4. On the positive site you can now install this software like that:
library(devtools)
install_github('stela2502/StefansExpressionSet')
or
install_github('stela2502/StefansExpressionSet', build_vignettes=FALSE)
This package depends on my RFclust.SGE package that you can install like that:
install_github('stela2502/RFclust.SGE')
I had extreme problems installing this lib on a headless shiny server as it depends on the rgl package.
I always missed was the libpng-devel package!!