While the BDE installer allows you to keep old projects alive, it is an obsolete technology that hasn't been updated since the late 1990s. It struggles with modern Unicode data, lacks security updates, and is difficult to deploy on locked-down Windows environments.
If the components don't appear, go to Component > Install Packages . Check if "Embarcadero BDE DB Components" is listed and checked. If not, click "Add" and browse for dclbde250.bpl in your bin folder. bde installer for rad studio delphi c builder 102 tokyo free