You'll first need to export the project, make the project available on the other machine, then use the import function.
Select the location you would like to Export the project file and click Save.
You can then move the project file to any location, such as a portable external drive. You can also use a file sharing service like AirDrop or WeTransfer to share the exported project file between computers.
The great thing about your exported .fsd file is that Fundy Designer creates smaller proxy images from your original files when you import images into a Project. We do this for a couple reasons. First, it makes everything run extremely fast. Additionally, it makes your projects portable. Once your images are imported to a project, you can disconnect from the external drive or server and keep designing. You only need to reconnect to your original high-res images when you are ready to export.
The Import feature is detailed below.
To import a project file that has been exported from Fundy Designer®, select File > Import Project.