[Q] Xperia E3 D2212 4.4.4 update topic

I've searched in this forum and i haven't found a proper aswer about flashing the 4.4.4 update on the previous 4.4.2 version. I can't autoupdate it since I rooted my phone, so how do I do it? Do I lose the root and need to do it again? Thanks about the 4.4.2 root and if you can help me i'd appreciate that!
Peace!