I've tried to modify the .php file and delete the word "Search" from the code line for default text if empty title, but that doesn't work. Would be great if you could release a new version without this default text.
However, there might be another reason why it doesn't work for me. When I uninstall the plugin and then reinstall it, I noticed that WordPress still remembers the settings, e.g. I changed the size of the textbox from 15 to 20. So this error might have something to do with that, but I don't know where to delete those settings. Apparently they are stored somewhere else than in the plugin files that are deleted when uninstalling.
Thanks in advance for the help!