Sorry for the 3rd message on this, but I had a thought that just disabling Nool in the inimanager might not be enough, so I removed it from my PC entirely and well, you can see the result in the screenshot below. Back to what I said I used to get with your EGSS scenery now. So my advice to anyone is to think very carefully if Nool VDGS is worth a 20-25FPS drop, because that's what it did to me! No need to answer my question about rollback now. I'm happy to have got the performance back to what it was and can see that it was neither my system, nor the scenery to blame, but Nool does need a full uninstall and not just disabling in inimanager