It has been moved into separate packages, charactermappkg (runtime code containing the charactermap form) and charactermap_ide_pkg (designtime code for IDE integration). The designtime package normally is installed by default, I wonder why it is not in your case. Go to "Package" > "Install/Uninstall packages", select charactermap_ide_pkg in the right list, click "Install Selection", then "Rebuild". When the installation is complete there should be a new "Character map" item in the "Edit" menu.