Here comes a new capella 8 version.
How to update capella 8: In the Help menu, select the command "Online update". In the dialog click on "Search now". Confirm the update with "Yes" and follow the installation instructions.
You will find the list of improvements on the download page, sub-page "version history".
capella 8 was adapted to cooperate with tonica 13. You will find the feature "Composition with tonica" in the "Plugin" menu.