public void deleteApp() throws IOException
{
    Scanner in = new Scanner(System.in);
System.out.println("Which App do you want to delete? (App Number)");
int ch = in.nextInt();
File x = new File(appDir+ch+".txt");
boolean delete = x.delete();
if(delete)
System.out.println("Deleted!");
else 
System.out.println("Cannot Delete");
appMng();  
}