NtopNg - permanent factory reset!

Good health, dear colleagues!
Please help me solve the problem.
Why, every day when I log in to NtopNg, I am asked to change my password and have to constantly configure NtopNg itself?
After changing the password and logging in to NtopNg - I have a countdown to the end of the license expiration.Screenshot_2

NtopNg is free.

It seems a known bug.

Yes, you have for 10 minutes the pro version, then it switches to free version.

How do I secure the free version?