If the plugin was distributed as files instead of an installer:
Searching for a plugin compatible with Photoshop CS6 (64-bit) can be tricky since CS6 is an older version of Photoshop. For the safest and most reliable experience, you should use the official Imagenomic website to find the correct version. Official Download & Links noiseware photoshop cs6 64 bit link
Once the installer is obtained, correct placement is critical for the 64-bit link to function. If the plugin was distributed as files instead