delete false files after scanning

[goingdownsouth]

hello, as genuine newbee, an question, my first step with orange was to scan my C harddisc, result all files appear in the database tree.
I cannot find de tric to delete this files, or preferablely to delete this whole scanning operation of harddisc C, from the database, and start all over again.
Thank for a little help @+

[goingdownsouth]

I worked in the wrong screen, so navigate>entire selection screen> click and delete. Oki I'm forwarding now with little steps. Try and Error as to say, which is difficult with 900 Gb of music files, all mixed up. Hope I can guarding my courage. Laters