Quote - kasecki, I'm preparing for you a blender setup so you have just to unzip it and run, just have Lux installed, I'll contact you by pm (one of the advantages of free software :-D )

Thank you, I never used Blender, it has a lot of things, but its interface is very messy, there are things hidden that only appear if I resize a window, I open something and cannot see again what I was looking before, only quitting and starting again Blender and so on. I'm frustrated.

As for my batch job, another frustration.
I opened the hi-poly statue in MeshLab without problems, added ambient occlusion in 34 segs and saved in ply format. Two minutes work and all was done.
Next I tried to open the ply file and Blender freeze, appeared somewhere an error message text and have to kill Blender with Task Manager. Looks as Blender doesn't support vertex color and so it crash.
The reson of adding ambient occlusion to a mesh is that it looks nice and the ambient occlusion is stored as vertex color (ply format supports this feature).

Stupidity also evolves!