The best way to get evio 5.2 is to go to its
and follow the instructions there.
This link should bring you right to the evio-5.2 branch. In order to build in the resulting evio directory, follow the instructions in the README file.
If using Java, a jar file can be built, a pre-built jar file can be downloaded from this page, or a pre-built jar can be found in java/jars/java8/jevio-5.2.jar which was built with Java version 8. A jar built with Java 15 can be found in java/jars/java15/jevio-5.2.jar .