Notice that the database MUST be placed on the same machine, you have installed the Firebird server.
(eg. if your Firebird server is placed on your local machine, the database should be placed at the same local machine).

How to install the Firebird Server
Go to the GeoScene3d website and download the Firebird Server from there:

https://geoscene3d.com/Download

OBS: If the Firebird driver is placed in a folder, with a long pathway, it can be a problem (less than 100 characters should be fine).

**If you don't have the option above, see the Firebird page in Trouble shooting.**

Now the Firebird should work