In the main menu of the software, all the games are accompanied by various graphical icons.

The one I'm the most interested in is the grey key symbol. Games labelled with this icon seem unable to launch. Why is this, and how can I change this? Currently, over half of my games are unusuable because of this. Several of these games were tried on this card in the past, and were working just fine. I have already conducted a format of the memory card (true Kingston 4GB), and do not wish to format my card every week in order to use the DSTT.

Also, what does the little icon that looks like a white circle with the top left corner colored green mean? And the box with the plus sign in it?

Thank you!