I have been dealing with what I see as generally flaky practices of CCleaner related to Thunderbird for probably a decade, Now on my latest install to see if things have improved the product is telling me Thunderbird is obsolete software. Just how does that work? How do you decide Thunderbird is "obsolete"
What I have installed is V91.5.1 See https://www.thunderbird.net/en-US/thunderbird/91.5.1/releasenotes/?uri=/thunderbird/releasenotes/&locale=en-US&version=91.5.1&channel=release
Hardly an old release by any definition.
I also have installed BetterBird, a soft Thunderbird fork, but it gets no mention in your software as even a custom clean application. It also does not appear as an obsolete application, although the fork is just as recent and based off the current release version of Thunderbird you identify as obsolete, I would expect both to be clearly identified.
So I guess the question is how to make this product get with the times. If it can not identify a current release of software, is it capable of reliably doing anything. What is it deleting when it "protects my privacy"
