This directory contains a subset of historical versions of FieldTrip. In general we archive the latest released version of every year. If you are looking for a specific version not listed here, you can look at the tagged versions at https://github.com/fieldtrip/fieldtrip/tags. Alternatively, you can also check out a specific version using the git software like this: git clone https://github.com/fieldtrip/fieldtrip.git git rev-list master -n 1 --first-parent --before=2018-03-07 git checkout ee0774ac2374a2f696e1e373d59435de17bbf3e3 # using the SHA identifier that the previous command returned To go back from the detached HEAD to the master branch you would do: git checkout master