I got this update since some weeks on my 47LB650V, but didn't realize the better performance, cause I'm using as well a raspberry pi, so not too much the smart part of the tv.
I re enabled simplink and now I declare my self as a happy customer, works like a charm, tv is very responsive.
I recommend going for this update.
Software update 04.45.04 solved my problem with Simplink slowing down my 55ec930v! Finally! A now happy user! I experienced it with a raspberry pi.
In the Netherlands 2 versions of 04.45.04 exist on the support site of LG! They look the same with the same size but there are differences. I used the one with the word oled in the filename within the zip.
Starfish-dvb-secured-m14tv-32.arches-3246-04.45.04-prodkey_usb.oled_V3_SECURED.epk
Nowhere is told what the differences are. A file comparison tool tells me that about 10kb is different of the total size of 643 mb.