Files that begin with a '.' are hidden. Generally, these files contain configuration information and are hidden so that they are not accidentally deleted. If you need to modify a hidden file like .htaccess, then you will need to view hidden files so you can delete and upload them.
There are several ways to edit, delete, and upload hidden files. If you are using an FTP client, you should be able to change the settings so that your hidden files are viewable.

