Find the code in your xxxxxxx_Update.php page for your HTMLEditor content update. It will look something like:
<?php
// WebAssist iRite: Rich Text Editor for Dreamweaver
$WARichTextEditor_1 = CreateRichTextEditor ("nl_content", "HTMLEditor/", "100%", "400px", "Custom", "../custom/newsletter_Update_nl_content1.js", "".(str_replace('"', '"', $row_WADAnewsletter['nl_content'])) ."");
?>
Using your own equivalent recordset and row names, change:
"".(str_replace('"', '"', $row_WADAnewsletter['nl_content'])) ."");
to:
"".$row_WADAnewsletter['nl_content'] ."");
Once the image paths have been corrected once, updates should work properly, and the image links should remain intact.