Hm, could you try it on a different pc?
Can you try to turn off an antivirus temporarily?
I don't see a reason why that console example application should run once and not the second time.
Btw the .net applications are using the same licensing principle.
You can use it for free only if you store <= 5 templates.
There is no exception here.
If you don't store templates in jsreport and send it inside the request like when using asp.net mvc razor, you can use it for free.
But you can do the same if you run full standalone jsreport. It is not related just to the jsreport.Local .net nuget package.