Upgraded to Jarvis from 14.04 – many movies no longer play

I upgraded from Kodibuntu 14.0 to Jarvis (16.1) …. and now many of my movies no longer work via the library. This is especially true of the “.ISO” files.
Before I delete Jarvis and go back to 14 – anyone else experience this – and perhaps have a workaround or fix?

Thanks,

Michael