Probable Resolution #1:
You can proceed with an unsecure download of the LP360 installer to get by the “msi can’t be downloaded securely” by explicitly telling it to proceed in your browser. For instance on Chrome:
Probable Resolution #2
If your IT system blocks the unsecure download of msi files, then the LP360 installer is also available from the LP360 folder when you login to your account on our FTP site. Contact us if you do not know your login information for your account on our FTP site.