Modify the functionality of a Wordpress Plugin

We need to extend the functionality of a plugin for Wordpress called Bulk Photo to Product Importer Premium version (request to send the file if you want to study the best case the difference in premium is very little), free version: https://wordpress. org / plugins / bulk-photo-to-product-importer-extension-for-woocommerce / We need the following fields to be added in the shipping screen of the plugin (the fields should be complementary to the woocommerce product category, this means that are additional fields from the product category and should appear in the register of category also screen): Code Event (numeric field eg 506) Event Name (is the category of the product already exists in the plugin does not do anything, only applicable here to understand) Theatre (name of venue) information (description field of the category: "Event Name") City State Start Date (plugin already has this field) End Date (add another date field) Image Hood (this field populates the field of image category: "Event Name") . Instead the uploader of images that need this screen the user can send a csv file (. example attached xls format) and the file is interpreted as follows: Column A (Group) - should be set up sub-product categories (category is Father "Event Name") Column B (Choreography) - should be created sub-categories of products (category Father's Group) Columns C and And (Date and Dancer) - should enter as category description Choreography Columns F and G (Start and End Range Range) - will serve to read the files of photos related to this classification. The images are numbered and will be in a pre-defined folder with the following (example attached): folder: [event number example 506] File: event number - photo number example: / 506/[login to view URL] Column H ( tags): Setting this tag line like photos-products. finally the "Save and Convert" button continues but with the function of sending the csv file and let the server processing this registration and image conversion into products with native functions. the plugin, for example: product variations or is protected, etc. .. to the end of the process an email with log should be sent to the admin. the Front End: The name of the Father Category (Event) and all extra fields should become permanent when the category is being viewed or even sub-categories. (Send the theme used or if you prefer we access development project server with everything installed) If in doubt get the layout Thanks!