Hi Michael,
Stardog Cloud will be the best option, as no free downloadable option exists. We do offer a low-cost environment, Essentials, which can be purchased from any email address and will not be reclaimed.
Stardog Free now requires a business email address, as you have noted. The flow can be a little confusing when trying to authenticate using both Google and a username/password for the same email address.
Can you try going to https://cloud.stardog.com, logout if you still have an active session, select Continue with Google, and choose your md@michaeldebellis.com email address.
Thanks,
Laura
