You can build apps for Windows, iOS, and Android from the same codebase—something Borland 6 could never do. How to Properly Activate Legacy Borland 6

If you have the original CD, the key is usually on the back of the jewel case.

In some rare cases, Embarcadero support can assist long-time customers with legacy license transfers, though this is becoming less common as the old activation servers are decommissioned. Conclusion