I’d try looking for the vcvarsx86_amd64.bat file in C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\ . If it’s indeed there, try opening “%VS140COMNTOOLS%…/…/VC/bin/x86_amd64” in windows explorer. It should take you to the folder with that vcvarsx86_amd64.bat file. If it doesn’t, make sure that Windows has an environment variable called “VS140COMNTOOLS” and that it’s set to C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\
Open the blueprint, select the mesh component and disable “Receives Decals” under “Rendering” category, this should do it.