What is ActivInspire?How do I delete old flipcharts?

Files are stored on the computer that is connected to the board in my classroom.  
After trying to move the files to the recycle bin, there is no change – it doesn’t indicate that it has been successfully moved to the trash, and nothing is different when I open it again.

The only objects affected are the flipcharts.  It’s as if the program does not allow one to delete a flipchart.