The "check for new version" facility appears to be down with the following error in the console:
jquery.legacy.min.js:4 GET https://www.appnitro.com/check-latest-version/
net::ERR_SSL_OBSOLETE_VERSION
Further, there appears to be SSL issues with the password reset facility of this website as a non-styled page with two input fields was rendered with a "not secure" warning. Perhaps more alarmingly was the debug/source code of this forum showing when I entered an invalid password (http://discuss.machform.com/reset)