A couple of days ago this application was mentioned in the Forum and I decided to give it a try. There was no problem with the installation and it worked well. However, I decided that it didn't really suit the way I work, so I uninstalled it. Now there is a problem
Entering Control Center - Appearance - Theme I see an error message "This theme will not work as intended because the required GTK+ theme 'Shiki-Wise' is not installed". A check on Package Manager shows it as installed. So, I uninstalled it - decided to reboot the computer - and then reinstalled it. But the error message remains, even after a complete Shut Down and Start.
Now the burning question
How do I get back to the Helena installation Shiki-Wise default, please?