The editor popup menu had become very long, so we moved the object functions to an "Object Name" submenu (e.g. "Table EMP"). You can revert to the previous behavior by using the "InlineObjectMenu" parameter. For example:
"C:\Program Files\PLSQL Developer 15 Beta\plsqldev.exe" InlineObjectMenu
You can also add the following line to the Params.ini file in the PL/SQL Developer installation directory:
InlineObjectMenu=1