I have been using an electronics CAD package on & off for some time, but laast time I tried to load it, Norton blocked it as soon as it ran & tried to install updates claiming detection of 'Trojan.Gen.8', which seems to be some sort of 'generic' label given to unknown trojan behaviour detected by the heuristic algorithms. I am loathe to just set it as 'trusted' [in case AutoTRAX server has been compromised], but am suspicious that this is not, in fact, a virus. I couldn't load the sample file into the threat assessment site [web-site crashed on me]. The downloadable free latest version is available from ...
https://dexpcb.com/
I would expect the file to contact it's web host on boot to look for updates, and potentially check the licence level.
Regards, Jeff...