Im writing this post because there might be someone out there that did the same mistake as i did. I updated the firmware on my Retron5 and crashes suddenly occurred on my favorite games that worked perfectly before.
After searching the net for reasons for this you will find that many people are having many different issues and problems after updating the firmware. The short explanation for this is that after version 2.1 Hyperkin did some huge changes to the firmware which made it worse. Apparently the Retron5 used some code for emulating the systems that weren’t allowed so they had to remove this code replacing it with new code that wasn’t that perfect, and all this started with firmware v2.2.
So the solution to the problems and crashes is simply, go back to firmware version 2.1
So how do you do this? If you did what i did and updated to the very latest firmware which where v2.5 then when i tried to “upgrade” back to v2.1 i just got an error. Luckily there is one way to fix this, and that is to make a factory reset. Restoring the Retron5 to factory settings gives you the opportunity to then update it to what ever version you want.
To do the factory reset I had to follow the instructions on Retron5s page “Retron 5 Factory Reset Instructions”: http://retron5.in/node/4
After the reset is done and you start the Retron5 you must give it a firmware update. It asks for you to insert an SD card containing a firmware update and i don’t think i was able to continue without doing a firmware update first. So i simply downloaded v2.1 from Retron5s site: http://retron5.in/?src=d9d4f495e875a2e075a1a4a6e1b9770f
Then everything was fine again and every game played perfectly. I was surprised how easy and pain free the factory reset was and the firmware update to v.2.1 was simple and fast. I hope all the links above still works if you had the same problem as i did. Good luck!