How do I upgrade?

[SteveDunn]

Sorry if this is naïve question or if I've missed something obvious. I've been using this fantastic project for a few years.

I never tend to look at the internals of it, but I needed to recently as I have a gif that isn't animating.

I can see there's been some work in this area, so I thought it best to upgrade.

What is the best approach to updating? I ended up with a Beyond Compare session and manually copying stuff over, but wondered if there's another approach that I'm missing.