PMPro download protect for wp installed on sub-folder

# Paid Membership Pro/PMPro Protect Downloads
# Protecting "downloads/" folder
#
# Directory structure for wordpress installed on sub-directory
# public_html/
#            wordpress/
#                     downloads/
#                              VAGRoundedBT.zip
#                     wp-admin/
#                     wp-content/
#                     wp-includes/
#                     .htaccess
#
# BEGIN protected folder lock down
<IfModule mod_rewrite.c>
RewriteBase /wordpress/
RewriteRule ^downloads/(.*)$ /wordpress/?pmpro_getfile=$1 [L]
</IfModule>
# END protected folder lock down
# Test drive: http://example.com/wordpress/?pmpro_getfile=VAGRoundedBT.zip