Can I use the included maps on my PC computer with Memory-Map

No, you cannot do this. The maps included with the app are licensed for use on iOS devices (iPhone / iPad) and Android only.

You CAN however, use the purchased app on any devices which are linked to the same iTunes account or Google account which was used to purchase the app. 

If you purchase additional maps as out-of-app purchases via the Digital Map Shop, you ARE able to copy and open them with Memory-Map software loaded on your PC computer.