Exclude posts older than… ?

Hi there!

A client of mine wants to exclude posts that are older than a given month/year. I checked the documentation and found the rp4wp_get_related_posts_sql filter hook but it doesn’t seem to be available with the free version of the plugin as I couldn’t find it in the code (or maybe the documentation is not up-to-date anymore?)

Any ideas?

Thanks in advance for your help!