Our formats have changed as the industry has changed so our library tends to reflect that.
You will find the following formats listed on various textures:
These are the current ones we use. Our older products will have the following variations:
DX11 is going to be the same as PBR-Metallic while Basic is generally just the basic bitmaps without any specification on what shader language it is optimized for.
There is another thing to be aware of on this, not all of our materials are substances. For our older hand made ones Substance Designer had not yet been released to wide usage or the creation of the substance was made in a more hand painted, photoshop style that did not lend to that.