I have only receive 10 digit (Ex:DHEMJ-HNHS4) serial key via email. I’m try to install the USB Safe Guard.the installation window will ask 20 digit serial key(Ex: DHEMJ-HNHS4-DLEYJ-WNBS4).. why i didn’t receive full serial key. please give me correct serial key.. above mention serial key is only for example not a original key