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System Requirements
OS Windows 7 or later
macOS 10.8 or later
Ubuntu Linux 14.04 or later
Fedora Linux 21 or later
Memory1 GB RAM
Hard Disk250 MB available disk space
Display1024 x 768 or higher resolution

Changes in version 4.0.5 (Sep 14, 2017)


  • Added "Bacillus subtilis" to the list of organisms.
    (Requested by Maria Tang)
  • Relaxed the constraint for determining if a file is in SnapGene GenBank format, so that the last reference simply needs to have "SnapGene" in the JOURNAL field.
  • Sped up opening the most recent document.
  • Enhanced the display of segment boundaries in Sequence view.


  • Ensured that embedded files with &'s and other symbols in their names can be opened properly.
    (Reported by Joydeep Bhadury)
  • Fixed a regression that disrupted alphabetical listing of enzymes in the Choose Enzymes dialog and other contexts.
    (Reported by Dan Strongin)
  • Corrected the import parameters for natural DNA sequences in EMBL format.
    (Reported by Novozymes)
  • Fixed a regression that could result in recent files or collections not being shown in the various “Recent” menus after quitting and starting the application.
    (Reported by Ron Hart)
  • Restored normal function of the Align Full Sequences command on Windows.
    (Reported by Joel Särnefält)
  • Plugged several memory leaks.
  • Fixed a regression that prevented clearing lists of recent files and collections.

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