You have two options,
Either:
You can choose the newly created webassist/html_editor folder to be the one that is used (this would be the best choice if you are likely to be editing the HTMLEditor instance again in the future or adding HTMLEditor to more pages), if you choose this option you would need to upload the whole new webassist/html_editor folder to your remote server, and once your page checks out OK on your live site, you can delete the old HTMLEditor folder.
Or:
Copy the new artist_art_Insert_statement_art1.js into the original HTMLEditor/custom folder, and change the paths on your page that contains the Editor instance back to point to your original HTMLEditor folder. I don't know your site structure, but:
If the page with the Editor instance on it is in the same directory as the original HTMLEditor folder, the paths would be something like:
<?php
// WebAssist iRite: Rich Text Editor for Dreamweaver
$WARichTextEditor_1 = CreateRichTextEditor ("statement_art", "HTMLEditor/", "600px", "400px", "Custom", "../custom/artist_art_Insert_statement_art1.js", "");
?>
If the page was one level deeper than the HTMLEditor folder, the paths would be something like:
<?php
// WebAssist iRite: Rich Text Editor for Dreamweaver
$WARichTextEditor_1 = CreateRichTextEditor ("statement_art", "../HTMLEditor/", "600px", "400px", "Custom", "../custom/artist_art_Insert_statement_art1.js", "");
?>
