If you don't have an internet connection or have a standalone license, you're able to use the portal in offline mode. Select the button at the bottom of the portal's log in screen labeled "Log in Later". While in offline mode, you'll be limited to working with local projects.
NOTE: You must log in at least once every two days for your offline license to continue functioning.
Click on the dropdown under your project, and select "Show Folder".
Alternatively, navigate to
Copy the contents of the folder to a USB drive or use another method to transfer your projects data.
Create a new project on the second computer, repeat step 1, and move the files you copied into the new projects folder.