Why did you link HELP.spek.cc specifically? It appears to be an unsecured (http) outdated page with older (version 8.2/8.3) downloads.

But just spek.cc (liked on the github) is a substack site (odd choice for a project homepage) with version 8.5 downloads.

Github: https://github.com/alexkay/spek Substack: https://www.spek.cc/p/download