what non-linear optimization algorithm works in LO 5.3 on MacOS (and Windows)?

Hi everybody,

I just installed on my Mac OS 10.9 the latest version of LibreOffice (5.3) and wanted the non-linear solver that I had used in version 4.x to work. So far all my internet searches on this topic failed to provide a solution. The closest was

but that thread was closed without pointing to a solution.

There is still the beta version of the nlpsolver for OpenOffice on the internet,
but when I tried to install it in LibreOffice 5.3 on MacOS it got blocked halfway and I had to force quit LibreOffice.

Any link to a non-linear solver that works on LibreOffice 5.x (both Mac OS and Windows, its for my university students) would be highly appreciated.

Thanks in advance, Christian.