Filters

administration.php

<?php
$meta_boxes = apply_filters( "wpep_administration_course_metaboxes", $meta_boxes );
$meta_boxes = apply_filters( "wpep_administration_ebook_metaboxes", $meta_boxes );
$meta_boxes = apply_filters( "wpep_administration_video_metaboxes", $meta_boxes );

frontend_stylesheet.php

<?php
apply_filters( 'wpep_frontend_style_file', 'path-to/front/style.css' );
apply_filters( 'wpep_custom_css', 'custom-css' )
apply_filters( 'wpep_color_variation_css', $css ); 

links.php

<?php
apply_filters( 'wpep_course_link', $link, $post->ID )
apply_filters( 'wpep_video_link', $link, $post->ID )
apply_filters( 'wpep_ebook_link', $link, $post->ID )

templates.php

<?php
apply_filters( 'wpep_user_activity_course_sections', $this->course_map( $course_id, $user_id ) )
apply_filters( 'wpep_primary_content_category_list_html', $resp )
apply_filters('wpep_primary_content_course_list_args', $args )
apply_filters( 'wpep_course_single_content_header_args', $args )
apply_filters( 'wpep_single_content_header_html', $template_content, $args )
apply_filters( 'wpep_course_single_content_form_args', $args )
apply_filters( 'wpep_single_content_form_html', $template_content, $args )
apply_filters( "wpep_course_single_content_lesson_content", $content )

templating_logic.php

<?php
$located = apply_filters( 'wpep_get_template', $located, $template_name, $args, $template_path, $default_path );
apply_filters( 'wpep_locate_template', $template, $template_name, $template_path ); 
apply_filters( 'wpep_template_path', 'wpep/' ); 

text_strings.php

<?php
apply_filters( 'wpep_text_view_course', 'Start', $post->ID )
apply_filters( 'wpep_text_view_video', 'Watch Now', $post->ID )
apply_filters( 'wpep_text_download_ebook', 'Download', $post->ID )