now i installed it via update site, may be just a network problem.
but I still can't download a unzippable file from http://crotonresearch.com/grap…../download/ , same name, same size and same error. " can not open file /com.crotonresearch.graphrex_201204061059.zip as archive"
since installed by update site successfully, it's doesn't matter.
Version: Indigo Service Release 2
Build id: 20120216-1857
Version: Indigo Service Release 2Build id: 20120216-1857