: If the installer finishes but the tool doesn't appear in Photoshop, manually copy the .8bf filter file from the KnockOut installation folder to your host application's "Plug-ins" directory. Key Features for Complex Masking

Corel KnockOut 2 is a legacy masking plug-in primarily designed for Windows XP

If you must use this specific software on Windows 7 64-bit, try these workarounds: