How to remove the icon in the upper-right corner of the Cajview reader

　　Remove the icon method in the upper-right corner of the Cajview reader:

The first step is to open My Documents and go to my EBooks folder with "Ad0, event, help" three XML-type files.

The second step, they are opened in Notepad, "right"--> "open mode"--> Select Notepad, and then CTRL + A, the full selection, delete, and then save.

The third step is to set the properties of these three documents to read-only. What to do: Right---> "Properties"---modified to read-only (read-only tick)

After removing the effect, as follows: