I just installed Build 13 myself.
I only have 2 things to offer....
1. The default extension directory places the path statement incorrectly...
<?php require_once("/HTMLEditor/WARichEditorPHP.php"); ?>
which kicks out a fatal error...
Manually editing the path corrects the error...
<?php require_once("HTMLEditor/WARichEditorPHP.php"); ?>
2. With all of the previous products produced by WebAssist that I can recall...The upload times have been very short. This new product took 11:27 to push the HTMLEditor directory alone. I know that might not seem like a real issue, but some folks might think something locked up and give up (maybe) it's just that it's very different from anything ever produced before.
My 2 cents...
Tom92909