With new version of V-Ray 5, transparent decal is showing as black

[blueman26]

I am using the new V-ray 5 for sketchup. I had rendered a model successfully with this decal just last month using the previous version. Now that I've upgraded, I'm having problems again with a transparent decal. The transparent part is now black. Because the old version is gone, I have no way of going back into the model file to see if there were some settings somewhere that didn't get carried over into the upgraded version. So now I do not know how to eliminate this issue with making the decal transparent. Here are two images, the one showing no black area was done last month with the previous version. Now I need to use that model again and I'm getting what you see in the other image. Any help would be appreciated. Thanks

[Peter.Chaushev]

Hello,
Could you please check in the Asset Editor whether the material layer that hosts this diffuse map decal has its opacity source properly set (Custom Source: Diffuse Texture Alpha if the transparency comes from the image file)?
If adjusting the opacity properties does not resolve the problem, please share this particular material by saving it as a .vrmat file (together with its 'maps' folder).