UBB.threads PHP Forum Software Community Forums UBB.threads 6 Version 6 Support 6.5 Past 24 ours gives "You must be logged in to use the search engine"

Have upgraded to 6.5 and clicking on "Past 24 hours" gives "You must be logged in to use the search engine". How do I turn this off so it works like before (allowing anon users to search).

Thanks

T