Sorry about that didn't know it were separate files.
EDIT: Nimostar, I've just check the placement of my FaceTool.
I have it placed at: This Computer> C: (no sub folder).
I tried to moving it around a bit. If I place it in C:> Users, I get a similar error message as you (different error line though), but I could run the program from C:> Programmes and from the desktop.
My Heroes folder is located at: C:> Programmes(x86)> GOG.com> Heroes of Might and Magic 4 Complete (> Data)
You have both files Equi.h4r and Equi.aop in your Data folder?
Hope this helps.