I use Navigatrix distribution (navigatrix.net) with OpenCPN 3.2.2
I was used to windows based computers
But when it definitively crashed, I tried Navigatrix on a brand new "car pc". It's easy to install but I have to learn this new OS. Commands and config are very different.
Hopefully OpenCPN user interface is the same.
I already downloaded new distribution with OpenCPN 4. But as I'm not sure of how to do it without losing personnal data, up to now I didn't install the upgrade.
I'll take time to learn how to install a new version under Navigatrix (ubuntu based os)