Sorry, since there are many changes with c++ code in every recent version of UE4, which foundementally affect BP, we can not keep updating BP files.
Even we make BPs compatible with 4.7, there will be 4.8, 4.9…
Therefore, in next pack, we will make all functions built with pure BPs. But still, it is possible that those BPs are imcompatible with some future versions of UE4. Only Epic knows 