Problem with Enviro

Hello I use Atavism 3.0 and Unity 2018.2.17f1, everything works very well.
I bought Enviro 2.1.0 and when I launch my Atavism project in a few minutes my memory (32GB) is at 100%, the Data disk (SSD) is close to 100% and the processor goes crazy.
When launching the Profiler I notice that the number of meshes is 400 to reach 1500 before that the PC stops.
Who should I contact for this problem?
In advance thank you

Problem solved thanks to the reactivity of Atavism and Enviro. Thanks to Marcin and Hendrik for their professionalism and skills.