XDJ-RX no more firmware available???

Hey There!
Hoping anyone can help?
My XDJ-RX (1) not 2 keeps shutting down and restarting intermittent for no apparent reason. I realized I hadn’t updated the firmware since I bought it in 2015, so I looked on pioneers site, but can only find firmaware for XDJ-RX2. I also checked on the forum and it seems like others have had the same issue, and have been sent a link to the firmware, yet when I open it is no longer there!
Any help would be greatly appreciated!!!

Thanks!