After reading the manual, I'm learning to accept that the file checks use checkboxes instead of radio buttons. Alas, what happens when you check no boxes?
Speaking of the manual, the "Uninstalling Toucan" section uses the term "installation" instead of "uninstallation" ("If Toucan is not for you then...installation is very straightforward").
ok, I will clarify that, when you use none of the checkboxes the files are just copied by default. I shall fix the other point too, thanks for your feedback!