Help Package 'CLIMTRENDS' from Archive

Hello,
I need to run the 'climtrend' library which is no longer available, I downloaded and installed it from the archive on my pc but it doesn't work, it says "I can't find the function ..." what should I do? I absolutely need to use it, in addition to installing it, what should I do to use it?
thank you in advance for your kindness,
Regards
Francesca