Hello,
I had the Pro Trial of CCleaner Cloud.
In the Account Settings I have activated the two-factor authentication.
Some days ago my trial period expired and I did not yet upgrade to Pro.
But the two-factor authentication is still working!
The two-factor authentication is a very strong argument to become a Pro user.
So it should be de-activated after the Pro Trial expires.
Otherwise users can use the two-factor authentication without having to pay any money.
Greetings
OLLI