Yutaka responded to me immediately.
In terms of a workaround, if you experience this issue, the following step will correct it:
1. Tools -> Quick Launch -> Reset All Settings
However, to save your previous settings, you can do the following BEFORE executing the “Reset All Settings”
1. Tools -> Import and Export -> Export all settings into a registry file
2. And then AFTER you “Reset all Settings”, run Tools -> Import and Export -> Import all settings from a registry file …and import the file you saved previously.
Most of the old setttings will be restored correctly and the tray icon issue will not recur. You will probably lose your MRU lists. Toolbar customizations should be the same, but physical layout may be lost.
Thank you to Yukata!