At the time of writing this it appears that the licencing for Talend has changed but you can download Talend Big Data at Talend Open Studio for Big Data download | SourceForge.net however it appears that this product supports neo4j 3.x not neo4j 4.x. There are lots of jar files you can download so I am sure you can get a more up-to-date version.
The licencing change is very frustrating.