Don't have API key

Good afternoon!
I paid for the paid version of the plugin, but I can not use it for 4 days!

1. When I enter the API key in the plugin wordpress, he can not keep it http://joxi.ru/Dr8vPxNSkKM502.
2. When fill out the form Missing API key on your website, in a letter do not have my key.

Please help.

https://ww.wp.xz.cn/plugins/ewww-image-optimizer/