First of all, get well soon.
How did you activate your device. I think you can help friends in the same situation step by step.
The model of my device is ‘Model is PF50KG-GL’ .
I switched to v03.00.17 without any problems. there is now a store application and I can download and use the application, I did not observe any slowness or colour distortion. but those who want to switch should be careful.
He suggested to a friend on Telegram to switch to the following version, but I couldn't do it because I was afraid of the device being a brick.
Now that you've found your way back, you might want to give it a try...
http://su.lge.com/GlobalSWDownloadCdn.laf?IMG=/201801/starfish-dvb-secured-m2r-574.drto.m2r-57410-04.70.35-prodkey_nsu_V3_SECURED.epk