If at any time you see this screen.

 
this means that you can not go past today's date as the diary is a passed events diary and it is not concerned with the future.

The following screen below

means that you cannot go beyond the starting date of the diary that has been programmed in the Anxiety diary.

The following screen below

This means that the search term, can not find any matching data in the diary or the case is insensitive/wrong or your have misspelt the search term.

The following screen below

This is the message that you get when you close the program once you have clicked on the red X in the top right hand corner of the main form.