Populate function issue (assembly problem?)

Hi everybody ! 

It's been a couple of semesters I'm using grasshopper and this time it seems that I'm quite stuck with an odd issue.

Shortly : I've been working on Rhino WIP + GH 1.0 but for some reason, mostly interoperability between softwares, I've decided to downgrade to Rhino 5.13 + GH 0.9.0076

I've cleaned everything on my HHD + my SSD, including the Windows Registry (manually), then reinstalled rhino, gh and every plugins I used to have.

It seems they're all working pretty well, but for some reason, when and only when I try to use the populate function in grasshopper (pop2d, 3d and geom), GH doesn't do it.

I got this message : 

1. Solution exception:Impossible de charger le type 'Grasshopper.Kernel.Geometry.Tree3d`1' à partir de l'assembly 'Grasshopper, Version=1.0.0.20, Culture=neutral, PublicKeyToken=dda4f5ec2cd80803'.

Which could be translated in english by 

1. Solution exception:Impossible to load type 'Grasshopper.Kernel.Geometry.Tree3d`1' from assembly 'Grasshopper, Version=1.0.0.20, Culture=neutral, PublicKeyToken=dda4f5ec2cd80803'.

I've tried with different inputs (geom, lines etc) and none of them work.

For me, it's a problem of .dll file, but I'm not sure. And since it's taken me quite an amount of time to clean and reinstall the whole setup, I want to have your opinion about the thing. Plus I won't be sure where the incriminated file is located.

Thanks for your help !