Avast home edition update in offline

Hello,
My system is in offline. I already installed avast 4.8 home edition before six months and i update the definition regulary. My problem is two days before i remove the antivirus and reinstalled the same antivirus. Then i dowload the recent updates file "vpsupd.exe" and i double click the file but the recent update will not work properly. it gives a error message. Please give suggestion.


regards,
Rajesh