Question about r4i gold clone flash cart I bought

Hi, I was at goodwill and saw a cheap r4i flash cart and bought it so that my brother could play ds games with me. I was checking the list of firmware for all the cards and there where quite a few for r4i gold. The only problem is I checked the box that it came in and it says it was from r4-pro.com, a website which no longer exists and which wasn't on the list. Which firmware should I use for it?
Thanks in advance

ps: if this is a stupid question mods please remove