Aehemm: select the folder and hit 'delete' (the key on your keyboard may be labelled only 'del').
Seriously, there are no hidden files or settings. The repository is completely contained in one folder tree.
The same applies to working copies. If you send a working copy to the recycle bin it can seriously slow down future deletes because of the large number of small files. You may want to empty the recycle bin soon after.