How to tell if CFW is CEX , DEX or REX ??

Hello guys , I have a couple of questions with regards to update

1. I am trying to update my CFW and I don't know wether it is rex , dex , d rex or cex . How do I do find that out ???

I am pretty sure that I Have 4.82 rebug rex although I want to be sure

2. If I do update to a new CFW Will I retain all my pkg games or will I have to reinstall the licenses via react psn???

3. Can I install the...

How to tell if CFW is CEX , DEX or REX ??