There are three questions on SE sites about "Hide X":

* https://superuser.com/questions/811109/is-there-any-advantage-to-using-only-part-of-a-file-in-hide-xs-library
* https://askubuntu.com/questions/522656/how-do-i-save-a-file-with-hide-x
* https://askubuntu.com/questions/522662/how-do-i-add-a-new-file-to-hide-xs-library

Searching on various search engines for this tool it seems that these three links seems to be the only mention of this tool. Also if you check the profile of the asker and all of the answerers it seems they have been created at the same time, and they mostly only answer questions realted to this tool. (the same is true for the two questions on AskUbuntu)

Is this "Hide X" really an existing something, or are the asker and the answerer are just sock-puppets who are trying to get some rep from asking and answering junk?