How can i delete an old deployment?

Hi i have made some test on my SAP instace with net viewer developer studio and i have deploy some test application and i would like how can i delete the old one.

For example i have made a search:

[http://fdf.cod.free.fr/searchapp.JPG]

Maybe i have just only do delete all this folders and files and that's all?

If i do that ( delete on file and folder ) does the application stop directly naturaly?

Thx by advance.