Using Membership Premium plugin (I know there is a new membership plugin just released... but too late now). I have a page for members only with links to PDFs. I need these PDF urls to be protected so only logged in viewers have access to it. I tried putting the PDF url in the URL groups of Membership but that didn't seem to work.... I've read a lot of questions about this and find all of the answers quite confusing. I'm looking for a straight forward way to address this. Thanks.