Hi Jennifer, it would give me the green valid key but would disappear once I hit the save button without installing anything. This occurred no matter what browser or device I used.
Nothing I did would advance me past this stage.
I figured out this morning though. I had to deactivate everything except for the basic events calendar plugin. It accepted & saved the key fine after that.
Thanks for the response and I may write you again if I run into anything else.
-Kelly