Every time I launch Nicepage, a window pops up with the message:

Please Confirm Email
Please confirm your email to continue working with Nicepage. If you
haven't received the confirmation, you can resend it.

Resend Email

I click the button, the window disappears, and then reappears after restarting the program.

How can I get rid of this annoying window?

At the top of Nicepage, the message:

Please take a moment to verify your email address by clicking the link in the email I just sent.

And even though I click this button, this message will still appear the next time I launch the program.

Please remove this.