Critical Security Flaw: Activation Key Visible in Plain Text

I recently purchased the Nimble Pro plugin and encountered a critical security issue. After activating the plugin, I noticed that the activation key is displayed in plain text. This visibility poses a significant risk, particularly when working with clients, as they can easily copy the license key and share it in public or insecure environments.

For security reasons, it is essential that the activation key is encrypted or masked (similar to how passwords are handled). Until this issue is resolved, it is challenging to use the plugin securely in a client setting.