BoseControl became ANCBuddy, and existing BoseControl buyers do not need to buy again because ANCBuddy 2.x migrates existing license and trial data on first launch.
What migrates
ANCBuddy 2.x keeps the update path for existing users by migrating legacy BoseControl license and trial information into the new ANCBuddy app identity.
What to install
Install the current public release from the download page. The current public release is ANCBuddy 2.0.2.
If something does not migrate
Email support with your purchase email, Mac model, macOS version, and the ANCBuddy version you installed.