How to open .X4K file extension?

If you cannot open a new file that has been saved in the .X4K format you need to download the appropriate software. The manufacturer of .X4K files is Optimal Performance; .X4K files belong to the Settings Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .X4K files. Activities performed in the order described should solve the problems with all the files in the .X4K format.

• What is .X4K file?
• How to open .X4K file?
• What is .X4K file?