Make OpenCart Default help plz

[iowtheme]

Hi all Merry Christmas

I can NOT find the folder called OpenCart it want to delete the install file to run the OpenCart, is it hidden? I can only see the database folder?

How do I make OpenCart default. From the internet viewing my server with my IP http://xx.xx.xx.xx/opencart/index.php

is it possible to see it only by my IP http://xx.xx.xx.xx and not with opencart/index.php

thank you all

[iowtheme]

how do I connect to the following folders as I can not see folders, need to delete the install files as it is complaining.

mnt/md0/application/web-ext/opencart/

now doing my head in