Can you tell me how you unrooted? I just did the update last night and me device was rooted. I think me device is unrooted because I cant access superuser and busybox says cant get root access. Butt the isis wallet says im rooted.
I used LGFlashTool to flash my phone back to the stock jellybean from like November (completely erased phone). I believe I got all the links in the sticky that says how to root, restore to stock, ect.