Surprisingly, I could not find a video or detailed guide on how to do this, the closest most relevant thread I found was this.
I took some pictures that hopefully guide others on how to replace the blade, but it is extremely easy.
First snap out at by pulling the blade away at a approximate 90 degree angle, if it doesn't feel like it's coming out, just pull harder.
This picture shows how the blade aligns:
Here is another alignment picture as I was snapping the new one back in:
You snap by pushing it hard back in, again approximately 90 degree angle and watching for the proper alignment.