Hello gosmond,
We do not keep a list of links to previous releases available. Our support also only extends to latest version. However if you look at the change log and take note of the version number and build number, and adjust the download URL, you can still retrieve older versions. We however do not advise that.
If you have issues, please report them with log files to
https://openvpn.net/support so that we can investigate and resolve it for future releases.
Kind regards,
Johan