Decrypting F Series Firmware Updates...

[linkpuff]

I've been trying for ages now to use different tools to decrypt my F5000 series TV (ue22f5000aw running 1031.0) , its a non smart-tv and I'm fine with keeping it that way, but I'd like to code onto it some life improvement changes (like ease of access to audio-only setting from the nipple). All that comes from those tools is garbage I cant read or edit, is there any way I can get around this?