You're download will begin automatically. Below are the instructions on how to use this update:

1. Save and close all open GCK files and quit the GCK application.
2. Click on the link to download the new Gene Construction Kit 3.5 'dmg' file.
3. If not mounted automatically, double-click on the downloaded file to mount the disc image.
4. Within the mounted disc image, choose 'Edit --> Select All', to highlight all files and folders, and drag the entire set of updated files into your GCK3 program folder on your hard disc. Note: if you placed any of your own files in the corresponding folders on your hard disk, make copies of them before replacing them.
5. Choose 'Replace all' when prompted with the "an item named ... already exists in this location" warning message to overwrite your current files with these updated ones.
6. Launch the updated GCK program and verify the version by selecting 'About Gene Construction Kit' from the Gene Construction Kit menu.