[Q] Upgraded to 4.1.1 and lost rooting capability

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http://forum.xda-developers.com – I rooted my AT&T i747 with Android 4.0.4 a couple months ago and installed SuperSU as well and was working great. When I upgraded my phone to android 4.1.1 a few days ago I lost all rooting capabilities. My Titanium Backup Pro no longer has root access as well as my SuperSU and a couple of other apps that require it. I also have tried uninstalling SuperSU with no success. Could I just reflash my i747 just like I did back on 4.0.4 to root it again or is there a way to correct the current root access? What would you recommend? Thanks in advance! (HowTos)