I want to access my self hosted OpenRouteService-Server from TTMSFNCDirctions. Is this possible? Where can I change/configure the Server-URL?
Unfortunately there is currently no built-in functionality available to change the server URL.
However, this is a good suggestion and we'll consider adding this feature in a future version.
Alternatively, as a licensed user, you have access to the source code and you could manually change the URL in code.