Using AVG Antivirus 2011 again from backup

I uninstalled my AVG 2011 Antivirus Free installation yesterday. I would like to use an backup that was taken before the uninstallation was beeing performed. My OS is Windows XP sp3 and the AMD processor has no SSE2. Can I use the installation all over again?
Im looking forward to your positive answer.

Torbjorn, Have a look @ these 2 AVG articles…
[1] (https://support.avg.com/SupportArticleView?l=en&urlName=End-of-support-of-old-AVG-products)
[2] (http://avgread.me/1Ewajhi)
AVG Guru