anarose192 Hi
It appears that your account does not have an active membership on our site. However JA Megafilter is a paid extension and requires an active membership to access.
If you have purchased a JAEC extensions membership using a different account, please log in to the correct paid account to request support. Our team will be happy to assist you further.
If you have not purchased a JAEC extensions membership yet, please do so to gain proper access to the downloads and our support. You can purchase the membership at this page.