DVD Architect says my subscription will expire in 6 days. The product is no longer supported so there is no way to renew, i dont think? Is it just an artifact of when they supported the product and allowed you to give them money for it, or will I be unable to use the product moving forward?
I never knew DVD Architect had a 365 subscription option (unless it came with a VPro subscription). In that case you probably need to renew the VPro subscription. Otherwise, please see here.
Yes, it does look like that DVDA came with Vegas Pro 365 from Vegas Pro 15 - as per this Vegas 2018 magazine announcement introducing 365: https://vegas-magazine.com/vegas-pro-365/
The subscription options chart in the article shows that DVDA was included with 365. I hadn't realised that 365 went back to VP15.