Installed NextUI, after removing the card to put roms on, it reverted to stock firmware
So I installed NextUI, removed the card to put roms and music on the card. While I was transferring, I did turn the brick on because I thought it would revert to the stock firmware to see what it was like, but it still appeared to be NextUI. I turned it off again and after I put the stuff on the card, I reinstalled it and it appears to be bringing up the stock firmware. How do I get it back to NextUI?