hi dave,
depending on the OSX version, this is not possible anymore. In order to use VIA, the software must come from a trusted source. without that trust, it is not possible to create the IPSec profiles on OSX and use those system functions.
I think it started with Mojave. This means older versions (not from the App Store) will not work on Mojave and newer versions of OSX.
***UPDATE****
I just checked the version you are asking for, which is already from the app store. But I think the answer stays the same. It is not possible to download earlier versions from the app store. Only the latest one is available. All other versions, cannot be used, as they will not come the AppStore (trusted source)