3ds Max Datasmith Exporter issues

Hi,

Every time I try download and run the 3ds max exporter file - UnrealDatasmithMaxExporter_4_19_18_3.msi, I get the same error message.

I have deleted all older versions of Datasmith for 3ds max on my PC. I have looked under hidden folders, in the Registry.

I have tried to reinstall Max, reinstall Unreal, it keeps telling me the same thing.

Does anyone know where else I could look, what hidden folder might keep the old Exporter files.

I don’t know what the problem is, but I have new clients who want to use V-Ray workflow with 3ds Max and Unreal and I cannot help them because I need Datasmith to export the V-Ray scene from Max to Ue4.

I don’t have any other PCs to use, I can only think of formatting my machine and reinstall everything, hoping that will fix the problem.

Please, can anyone help.