Some FTP programs don't show hidden files such as .htaccess files by default. In Filezilla, a popular FTP program which you can download for free, you view hidden files as follows:
- Open the Filezilla FTP program.
- From the menu bar at the top of the screen select Server.
- Select Force showing hidden files.
- In the Remote Site panel on the right, you should now see all of your files including any hidden ones.
Files are normally hidden for a reason and editing them can break things. Please be sure you know which files you are editing and if unsure, seek advise from a web developer.