What you are seeing is strange - I don't get that at all through Chrome or FireFox. It loads properly for me. As far as the certificates, I use LetsEncrypt for my server (www.zubersoft.com), but www.zubersoft.download is a Cloudflare bucket that I use as a CDN to ensure downloads are quick across the entire world (as my server is located in the US). CDNs are pretty normal. As far as the certificate, something seems wrong with your setup. I just looked in FireFox, and it shows that zubersoft.download has a certificate issued by Google Trust Services (Common Name WE1), so that is definitely not a self signing certificate.
On a side note, you can get the companion app directly from my server if you prefer: https://www.zubersoft.com/mobilesheets/M...panion.exe
Mike
On a side note, you can get the companion app directly from my server if you prefer: https://www.zubersoft.com/mobilesheets/M...panion.exe
Mike