Ok. I'm making progress. You guys are helping me a lot. Thanks a lot! So it looks to me like EarlK has the 32 bit version and the 64 bit version of Java installed. Is that correct? I was successful in installing 64 bit Java. Should I uninstall my REW 5.19 (32 bit) version before I install the latest 64 bit version or can they both be installed together?
Both can be installed, but they share a common preference store and some of the V5.20 preferences aren't compatible with 5.19 (mainly the new Y axis choices) and will prevent it starting if they are set to something 5.19 does not offer.