This sounds a bit odd.
I assume you have installed Diodon through the Ubuntu repository. If so could you run the following command to make sure that Diodon is actually uninstalled:
sudo apt purge diodon diodon-dev gir1.2-diodon-1.0 libdiodon0
This sounds a bit odd.
I assume you have installed Diodon through the Ubuntu repository.
If so could you run the following command to make sure that Diodon is actually uninstalled:
sudo apt purge diodon diodon-dev gir1.2-diodon-1.0 libdiodon0