If the box is working there's no real need to upgrade firmware yet. The version you have was released at start of the year ,there have been 2 further releases,the only difference in them & yours being, fixes for y/tube/y ~~~~ app, reboot issues, the viability of the fixes varies from box to box.If ur box is ok leave it for now ,do a little research round the forum there's a few threads about this issue & differing opinions on the cause of it. The more you know the easier it will become for you