You are pointing to the right part of the EULA. If a product is for general release (and not just to UE4 licensees), you are not permitted to include Engine Tools. Engine Tools is defined as:
(a) editors and other tools included in the Engine Code; (b) any code and modules in either the Developer or Editor folders, including in object code format, whether statically or dynamically linked; and (c) other software that may be used to develop standalone products based on the Licensed Technology.
So at a high level, you’re not allowed to use code from the Developer or Editor folders.