To import a course in eFrontPro log in as administrator and from your Administration dashboard visit the Courses page. Over there you shall see a tabular list of all your courses.
Click on the caret next to the Add course button will open the Import Course (1) dropdown option where you can use to upload and import an already exported course.
After clicking on the Import Course option a pop up will appear asking you to upload the .zip file of the Course you want to import.
To export a course you can use the corresponding export option (2) from the Operations column. Click to export a course will output a .zip file (the Course ZIP archive) and you will be prompted to download it.