When upgrading to Unity 4 something strange happened:
I realized that I could no longer use the visual editor with my sprite collections.
The Open Editor button has disappeared from the inspector view of every sprite collection that I created or create thereafter.
HELP Hi, I came to report then when upgrading my project to Unity 4.0 everything seemed to work fine,
that is until I realized that I could no longer use the visual editor with my sprite collections.
EDIT: After redownloading the latest patch (2dtoolkit 1.8 path 3) and installing it to a new project I observe the following:
Initially any new 2d sprite collections work as expected with the visual editor accessible by the "open editor" button.
However as soon as I close the project the sprite collection is converted into a Tk 2d Sprite Collection Data script.
Rendering it unusable.
This never happened in Unity 3.5, why is it happening in Unity 4?
I am using Unity 4.0.07f XD