When trying to install newest version, I get the above message, is safe to run?

Yes. Used new code sign certificate and possible some warring messages.

Thanks, do you plan to fix this?

This should cure itself as Defender updates. It does not depend on the application. Maybe my signature is not the most expensive provider.

I hope you took the installer from my site?

ps: You can check https://www.virustotal.com/gui/home/upload if a virus is suspected