Yes, I have it checked, & it does save it to remember.
But the very first time you ever set up CCleaner on a computer, even if you have checkmarked that you do not want to see warnings, it still bugs you with "Are you sure you want to continue? Continuing will delete files..." etc...
Very annoying, since the only reason to block error messages, is so they are gone. I am not sure if you can temporarily move your .ini file to another folder, then launch CCleaner to see what I mean. Or if that will reproduce it. But the very first time you set up a computer, CCleaner always asks...