Install Big Business Server 14 on AWS is the same as for a local computer but remote.
Remote into Windows Server, run the Edge browser, and go to https://bigbusiness.com. On the Download tab, click Windows Server, wait, and click ellipsis... to choose Keep. Show More, Keep Anyway, wait, and click Open File. Run the Installer and Finish.
Start Big Business Server 14 from its Shortcut on the Desktop and follow the prompts to open a copy of your Data File, or the Demo File found in the Program Files folder. Wait once more for a minute while it compresses files. Waits are disk use, now done.