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System Requirements
OS Windows 7 or later
macOS 10.10 or later
Fedora Linux 21 or later
Red Hat Linux 7.2 or later
Ubuntu Linux 14.04 or later
Memory1 GB RAM
Hard Disk250 MB available disk space
Display1024 x 768 or higher resolution

Changes in version 4.2.2 (Jul 20, 2018)


  • Made various textual enhancements.
  • Enabled opening of non-native zipped files.
  • Added the ability to designate an open collection as the Main Collection from within the collection interface.
  • Added the option to import files into a specific collection folder.


  • Improved stability when loading some files on Windows.
    (Reported by Chris Horoszkc)
  • Ensured that keyboard shortcuts for switching between alignment algorithms will work even when when focus is on the Description.
  • Enabled mouse wheel scrolling when viewing an alignment on Windows or Linux.
  • Fixed a regression that cleared collection selections when Save/Save All/Save Changes auto-switched from Unsaved to All.
  • Ensured proper display of the file name in the title bar after opening a compressed sequence trace.
  • Updated the names of various New England Biolabs ladders.
    (Requested by an anonymous user)
  • Fixed various issues with activating and using SnapGene for some Windows users.
  • Ensured reliable alignment and saving of sequence traces on some Windows systems.
    (Reported by Y. Hiraoka)
  • Configured the Restriction Enzymes window to appear on top of a sequence window when double-clicking an enzyme in the Choose Enzymes dialog.
    (Reported by Carles Alvarez)
  • Corrected various issues with maintaining and updating item selections in the collection interface.
  • Fixed an issue with removing a combination of files and folders in a collection.
  • Ensured that the "Duplicate in New Window" and "Add to Working Set" buttons will be disabled when an empty folder is selected.
  • Improved the response when selecting a folder with empty child folders.
  • Ensured appropriate clearing of the information at the top of the interface when selecting an empty folder in a collection.

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