Notice in our current System Requirements that Windows Server 2019 is NOT officially supported yet.
FogBugz License Costs
Additional License Costs
FogBugz On-Premises does NOT include any Windows or Microsoft SQL Server licenses. You will need to acquire those separately from your Microsoft Licensing partner.
If you move to FogBugz On-Demand, your costs will be easier to calculate since FogBugz On-Demand costs depend only on the number of users and features used. The operating system, database server, and maintenance costs are all included since it is a cloud service (SaaS).