Reimport Material Conflict (FBX Reimport)

Thanks for responding Dan but can you go into more detail about the tool itself? What is color key on the bottom- like "auto matched? Also when I right clic the “reimport asset materials” > “unamed” I have two choices in the drop down. “World Grid Material” and “World Grid Material” (excactly the same but choosing one keeps it green and “unamed”. Choosing the other makes it green and changes it to “unnamed match with [1]WorldGridMaterial”