Hi Eduan,
I did find a file under plugins/s2member-files
here the contents:
Options +FollowSymLinks -MultiViews -Indexes
<IfModule mod_env.c>
# No GZIP for script-based file downloads.
	SetEnv no-gzip 1
</IfModule>
<IfModule mod_rewrite.c>
# Enable rewrite and configure base.
	RewriteEngine On
	RewriteBase /
# Initialize all environment variables we're using below.
	RewriteCond %{ENV:s2member_file_download_setup} !^complete$
	RewriteRule ^(.*)$ - [E=s2member_file_download_wp_vdir:0,E=s2member_file_download:$1,E=s2member_file_stream:0,E=s2member_file_inline:0,E=s2member_file_storage:0,E=s2member_file_remote:0,E=s2member_file_ssl:0,E=s2member_file_download_key:0,E=s2member_skip_confirmation:0,E=s2member_file_download_setup:complete]
# Handle virtual directories, common on multisite networks.
	RewriteCond %{ENV:s2member_file_download_wp_vdir_check} !^complete$
	RewriteCond %{THE_REQUEST} ^(?:GET|HEAD)(?:[\ ]+)(?:/)([_0-9a-zA-Z\-]+/)(?:wp-content/)
	RewriteRule ^(.*)$ - [E=s2member_file_download_wp_vdir:,E=s2member_file_download_wp_vdir:%1,E=s2member_file_download_wp_vdir_check:complete]
# Handle streaming download requests via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-stream/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%2,E=s2member_file_stream:,E=s2member_file_stream:&s2member_file_stream=yes]
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-stream-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_file_stream:,E=s2member_file_stream:&s2member_file_stream=%2]
# Handle inline file requests via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-inline/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%2,E=s2member_file_inline:,E=s2member_file_inline:&s2member_file_inline=yes]
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-inline-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_file_inline:,E=s2member_file_inline:&s2member_file_inline=%2]
# Handle storage specifications via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-storage-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_file_storage:,E=s2member_file_storage:&s2member_file_storage=%2]
# Handle remote authorization requests via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-remote/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%2,E=s2member_file_remote:,E=s2member_file_remote:&s2member_file_remote=yes]
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-remote-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_file_remote:,E=s2member_file_remote:&s2member_file_remote=%2]
# Handle SSL file requests via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-ssl/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%2,E=s2member_file_ssl:,E=s2member_file_ssl:&s2member_file_ssl=yes]
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-ssl-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_file_ssl:,E=s2member_file_ssl:&s2member_file_ssl=%2]
# Handle file download keys via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-file-download-key-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_file_download_key:,E=s2member_file_download_key:&s2member_file_download_key=%2]
# Handle confirmations having beek skipped via the rewrite engine.
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-skip-confirmation/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%2,E=s2member_skip_confirmation:,E=s2member_skip_confirmation:&s2member_skip_confirmation=yes]
	RewriteCond %{ENV:s2member_file_download} ^(.*?)(?:s2member-skip-confirmation-(.+?)/)(.+)$
	RewriteRule ^(.*)$ - [N,E=s2member_file_download:,E=s2member_file_download:%1%3,E=s2member_skip_confirmation:,E=s2member_skip_confirmation:&s2member_skip_confirmation=%2]
# Cleanup variables not used in this request. Looking for `0` values.
	RewriteCond %{ENV:s2member_file_download_wp_vdir} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_download_wp_vdir:]
	
	RewriteCond %{ENV:s2member_file_stream} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_stream:]
	
	RewriteCond %{ENV:s2member_file_inline} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_inline:]
	
	RewriteCond %{ENV:s2member_file_storage} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_storage:]
	
	RewriteCond %{ENV:s2member_file_remote} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_remote:]
	
	RewriteCond %{ENV:s2member_file_ssl} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_ssl:]
	
	RewriteCond %{ENV:s2member_file_download_key} ^0$
	RewriteRule ^(.*)$ - [E=s2member_file_download_key:]
	
	RewriteCond %{ENV:s2member_skip_confirmation} ^0$
	RewriteRule ^(.*)$ - [E=s2member_skip_confirmation:]
	
# Put everything together now and process the internal rewrite.
	RewriteRule ^(.*)$ %{ENV:s2member_file_download_wp_vdir}?s2member_file_download=%{ENV:s2member_file_download}%{ENV:s2member_file_stream}%{ENV:s2member_file_inline}%{ENV:s2member_file_storage}%{ENV:s2member_file_remote}%{ENV:s2member_file_ssl}%{ENV:s2member_file_download_key}%{ENV:s2member_skip_confirmation} [QSA,L]
</IfModule>
<IfModule !mod_rewrite.c>
	deny from all
</IfModule>
What can I do with it now? :)
Thanks!