After installing the plugin, and activate the license key. It is to my surprise that the license key is vulnerable to be abuse by others.
The license key credentials are not in star format but exact key for others to just copy and paste it by a rogue administrator.
As a website developer and designer that makes websites for clients, I have experienced before that one of my plugins I used to create a website had been abused by dishonest client staff for its personal interest.
I would like to suggest Mighty developer to look into this serious matter for the benefit of plugin license key security.