[Q] Re-root android 4.4.2 g3 on sprint topic

So my device was previously rooted on 4.4.2 and at the beginning of December there was an update available. I got excited thinking it was 5.0 so I decided to update. Well all it was was a patch I'm still on 4.4.2 unrooted now and I CAN'T get rerooted.. I've tried purpledrake I've tried stump (original root method) and I've tried ioroot.. None of which have worked.. Any suggestions out there?

Sprint LG g3 ls990