If you want to update a JATOS server from version < 3.7.1 read the release information from v3.7.x first. Try out the new version on cortex.jatos.org. Changes in 3.8.3 Bugfix: broken log-out (#291) Changes in 3.8.2 Bugfixes Result data exported as Plain Text missing line-breaks (#285 ) Malformed cookies from older JATOS versions can cause an InternalServerError with some browsers GUI: Use browser's local date-time (instead of server's date-time) at e.g. Start Time or Last Seen in the result pages Study Links, in the setup for the Personal types - add a button group to toggle between visibility of All, Active, Deactivated, and Used study links JATOS API: new endpoint to get the directory structure of a study assets directory in JSON A lot of administration improvements: Abolished server-side cache -> all state is now either in the database or in cookies (easier to run JATOS on multiple nodes) Logs config: Allow to configure the location of the application logs Allow logging to file or stdout production.conf - Equalize property names. Most common names all start with jatos. now, but old-style names are still supported. Abolished use of X-Forwarded-* HTTP headers (X-Forwarded-Proto, X-Forwarded-For, X-Forwarded-Ssl) (easier to run JATOS in complex system layouts) Changes in 3.8.1 Introducing the JATOS API Access JATOS from the programming language of your choice (e.g. Python or R) Specifications in OpenAPI Uses personal access tokens for authentication Have a look New results export format: JATOS results archive (JRZIP) Formalize the study exchange format: JATOS study archive (JZIP) GUI: Simpler result pages and support of JATOS Result Archives (JRZIP) GUI: Study links page - remove All Workers button jatos.js: Standardize the behavior of empty/null in jatos.studyJsonInput, jatos.componentJsonInput and jatos.batchJsonInput (#277) Fix result data size checking of jatos.submitResultData Fix issue with JATOS on Windows - sometimes loader.bat closes immediately (#265 ) Previous releases: github.com/JATOS/JATOS/releases Which variant do I need? If you have Java (version 8 or 11) already installed (all OS): jatos.zip No Java installed: Choose according to your OS between _jatos_winjava.zip _jatos_macjava.zip (if you have problems install your own Java with brew) _jatos_linuxjava.zip If you prefer Docker: hub.docker.com/r/jatos/jatos