Hi Bob
Some more info about what I've done using current 4.9.2:
After removing the previous decoderindex.xml from my user's folder (created with 4.9.1 when I updated the Zimo V36 Plus profile), and seeing that I was able to open roster entru or add a new entry:
1) I then recreated the decoderindex, thus creating a new "local" decoderindex.xml,
2) I was able to close then start JMRI again,
3) I was able to open roster, add a new entry (see below), update decoder definitions, rebuilt roster....
3) So all seems fine BUT:
I found a small issue with the 4.9.2: when creating a new roster entry, it doesn't show up in the roster.... I had to rebuilt the roster to see this new entry in my roster.
When using your latest built #1765 (4.9.3....) once a new entry is created, it shows in the roster.
Alain from Paris
alain c