Yes you can! The basic features of the maps functions don't change with the free version vs the PRO version - you just get more options with PRO. Use the same method to download maps for offline use with PRO that you would with our free version.
In app, once signed in, click the "download map" button on any map to save it for offline use. Then, you can access and find them by clicking on your profile button, and scroll to the offline map details.