Okay. Just for thrills.
Whatever host you have should have a control panel to manage your site. There should be a option to upload files.
If this is to much to deal with at this time there is another option that you can use in the ubb control panel to copy a style without uploading anything.
This will add another style using settings from an existing style you have installed already. Such as Ubbthreads-stock and ubbthreads-dark.
But you should look into a ftp program to at least make backups.
One I use which is free is
http://filezilla-project.org
