In this forum, there are users that install the newer versions of PD and then find that the same beloved templates do not appear in the newer versions of PD. Custom Particles created years ago does not appear in PD15. One remedy is to find them in the DirectorZone or upload the beloved customs missing ones from the old version of PD to share in the DZ. This tool eliminates that need and it works well.
Let us know if this tool works for you.