The data served by the CLICS web application was aggregated from 30 datasets using the pyclics Python package, following the procedure described in the README.
The datasets as well as the aggregation software are archived on Zenodo for longterm availability and should be downloaded from there.
As long as the Python Package Index (PyPI) and GitHub are around, though, installing the software from PyPI and retrieving the datasets from GitHub - as described here may be more convenient.
CLICS³