It doesn’t crush ENS or something so don’t worry..
I found that if I set up an ENS material and “Save As” it to some library, Fredo6 ThruPaint (which I use extensively) doesn’t see ENS specific settings when introducing new material to the model.. It works with no problem when material is already one of the materials.
So if You have created a library on ENS setted up materials and want to use them in Your model, than when You pick the material from that library and paint it in Your model for the first time do it with native sKetchup Paint Tool. ThruPaint will make it a ‘flat’ sKetchup material loosing any links to bump, roughness etc. and mixing Tint Color and Color settings into texture image..
I don’t think there is much for ENS people to fix, but mentioning it for Fredo6 Tools users (which are plenty I believe) and I will let to know about that To Bilbo of the Baggins..