Niran has released an SSA compatible version of the Nirans Viewer. Niran is wanting feedback on some aspects of the new release. See the announcement: Nirans Viewer 2.2.0 Alpha (2656).
The download is on Source Forge: Nirans Viewer.
I haven’t tried to run it. So… you are on your own. Well, there are about 500+ downloads of this version as of 3 PM SLT.