Another question
 

What is Firmware? What does it do? How do I know what kind to use for my player?

I tried looking this up but came to a lot of dead ends :(

_Kate_ , word of advice is to never ever update your player with someone else's firmware. As each firmware was specifically coded for a specific batch of players. So even with the same manufacturer's name and version number, most likely you'll brick your player.

The firmwares in the downloads section are meant for recovering dead player, not for updating firmwares.

Firmware is the software 'OS' installed on the player like windows on a PC. :p