this option if you do not have a license and wish to test the product. In demo mode, files containing up to 64 kilobytes of data can be saved. Saving a file in demo mode is
a safe, read-only operation and does not affect future recoverability. (However other unrelated events happening on the computer may reduce your chances of a successful recovery.)
You can also preview a picture file (such as a file with the extension JPEG, BMP, TIF, PNG, etc.) of any size by right-clicking on it and choosing Preview.
this option if you have a license. Licenses can be purchased online at http://www.quetek.com.
I have a professional use license file
this option if you have purchased a Professional Use