I just installed your plugin on my simple WP site and all seems OK.
However, it first reported that there was no htaccess file in wp-admin originally, and now reports
"Your wp-admin .htaccess file is NOT backed up either because you have not done a Backup yet, an .htaccess file did NOT already exist in your /wp-admin folder or because of a file copy error. Read the "Current Backed Up .htaccess Files Status Read Me" button for more specific information"
The BPS file is there now.
Should I be doing something?