Have a quick read of my last post again. 
If you’re talking about the stock 0.4 to 0.5, have a look at the official thread. But please read through the posts. You may run into some problems. It’s definitely targeted at the more advanced user:
I don’t have a single scripted process made. I would have to run you through every single change.
Part of the process would involve doing exactly what I was trying to help you with re: mupen64plus. I did the exact same process. That was the easy part.
I have decided to not include any instructions on how to do it, but instead have links to all of the components I used for people to put together themselves.
As per @HalfBlood’s response in another thread, you can see why I have steered clear of having an upgrade patch from other versions: