A small caveat
SkIf needs large memory resources to analyze large data sets.
Examples of RAM requirements :
DNA comparison with 18 genomes, about 2.5Mb, used 880Mb of RAM
DNA comparison with 50 genomes, about 5Mb, used 14Gb of RAM
DNA comparison with 75 genomes, about 5Mb, used 30Gb of RAM
DNA comparison with 200 genomes, about 5Mb, used 170Gb of RAM