LumenRT Update 2 Crashes A Lot --- General Issue or My Install?

LumenRT Update 2 crashes so often it is practically unusable.  It crashes on startup, when loading files, when saving files, when editing materials, when orbiting in a view.  I wonder if the latest release is that unstable or, conversely, if something is wrong with my installation.  I am attempting to troubleshoot this situation.  Anyone else have more instability with the latest release of LumenRT?

Thanks in advance for your responses.