360 renewal

I have Norton 360, version 22.5.2.15 on 3 computers - expires in 25 days.  If I use the online renewal via the Norton website, will it renew 360 or will it install the new Norton Security w/backup?   I read via the forum 360 is being discontinued and the NSwB has less features than 360.   Also, if I choose to renew Norton 360 (and it renews 360 with all the current features, i.e. reg edit, cleanup, etc) via the Norton website, exactly what do I need to do before or after the purchase?  Will the renewal of 360 automatically upgrade 360 to the latest version (2.5...)?  Does this upgrade for 360 contain all the features of my "old" 360?   Sorry for the out of sequence questions - I have had Norton since 2006 and renewal, upgrades have always ended being a problem and I'm a bit hesitant to go through all that again.