Thank you for your prompt reply. I installed the latest version of Wine and checked for updates. I installed the latest RU Host using Wine. From my Windows PC, I can connect to the Linux Mint machine. I can take control of the mouse, but it will not register clicks or the keyboard, so I can't actually do anything.
I also just noticed as I was confirming this I cannot see the login screen. My view is black until the user is logged in. This is not helpful, since users are not Administrators on our Mint computers.
On further testing, I've also found the Host does not start for Desktop level user. Please pass to the developers working on the actual Mint version to include this functionality. We cannot give the primary users of the Mint systems any access above Desktop User, but we need the Host to be available when they are logged in as such.
I have successfully installed RU Host on a Linux Mint 20 laptop and connected to it with Viewer on my Windows 10 laptop. However, I cannot take Full Control of the Mint machine. If anyone has made this work, please let me know what additional steps you took.