Hi kpturner,
TLS/SSL support feature is optional for Allegro edition and included in "Presto" and "Vivace" edition, so if you want to test SSL you should dowload
Lightstreamer 5.0 Colosseo "Allegro/Presto/Vivace" and set "Vivace" or "Presto" in <edition> parameter of lightstreamer_version_conf.xml file.
About compatibility the main difference between the editions are the
additional Features and Capabilities which distinguish each edition; so the code (on both adapter and client side) that works with your "Moderato" edition will work so fine with "Allegro / Presto / Vivace" edition too.