Attribute type don’t saved

Hi,
few hours ago my colleague bergaminalex bought your plugin in codecabyon. The purchase code is:

In my site I have one product attribute. It called COLOR.
When I change the attribute from “Select” type to “Variation Image” type and save, after the saving the field is still “Select” and no “Variation Image”.
See this video: http://somup.com/c36O2jvUDo (now the site is slow because it is in a developer hosting).

I deactivated all the plugins and set the basic theme, but this thing happens anyway.
Why? I have a multisite site. Is it for this?

This is a development site, so you can enter and test what you want without problems.

Waiting,
thanks.