Acronis now focuses its development on the Acronis Cyber Protect Home Office (formerly Acronis True Image) ecosystem, which focuses on security and backup rather than low-level boot management. How to Still Use Acronis OS Selector
If you own a license for Disk Director 11, you can download the Bootable Media to install the OS Selector even if it’s not visible within your modern Windows environment. acronis os selector 2021 download
If you specifically need this legacy tool for an older system (e.g., a machine running Windows XP, 7, or a custom Linux build), you can still access it through older software versions: Acronis now focuses its development on the Acronis