If you have any experience with git, you should be able to create a deployment via:
git clone https://github.com/pkp/ocs
cd ocs
git checkout ocs-stable-2_3_6
git submodule update --init --recursive
You could then use the files in the “ocs” directory as your install package, as with any other upgrade.
Without using git, you will be dependent on waiting for a formal release.