svoid stefansOS_cleanDiskCaches() {
  L<File> files = filesOlderThanNDays(days, deletableProgramJars());
  S stats = renderFilesStats(stats);
  deleteFilesVerbose(files);
  L<File> filesDeleted = garbageCollectProgramJarsOlderThanNDays(7);
  infoBox("Cleared JAR cache - " + stats);
}