FileInfo.com - The File Extensions Resource

.8BY File Extension

File Type	PhotoDeluxe Plug-in
File Format	File
Common?	No
File Description	Adds extra features to Photoshop or PhotoDeluxe; belongs in Plug-ins folder within Photoshop or PhotoDeluxe folder
Program(s) that open 8by files	Mac / Windows: Adobe Photoshop or PhotoDeluxe

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/8by