Variations name

Hello,
I purchased the plugin a few hours ago after I used the free version.
I have a pretty big problem.

Let me try to explain as good as possible the problem.

On Product Attributes tab, there is a lot of variations.
But I want to change “black” to “Black” and this is not possible.
If the word is “black-01” it can be changed to “Black”, but if is just “black” it doesn’t change to “Black”.

And I am not able to change the variation name in any way. I tried to go to the product and edit the variations name but I can’t.