BoxedApp SDK is a developer library that provides a set of functions for emulating a file system and a system registry for an application. Using these functions, you can create virtual files, fake registry entries, keys and values. You can launch processes from the memory directly, use ActiveX without registration, embed runtimes like .Net, Flash and VC++ redistributable.

BDE Installer for RAD Studio, Delphi, C++Builder 10.3 Rio
Note: you need 10.3 Rio already installed to add the BDE to your installation.

Note: after you have installed the BDE, you will also need to install the components into the 10.3 IDE if you want to work with the components at design time.