Flash based extensions are not supported by PS CC 2014 anymore. Please refer to http://blogs.adobe.com/photoshopdotcom/2014/04/photoshop-spring-cleaning.html, http://blogs.adobe.com/jkost/2014/06/installing-the-2014-release-of-creative-cloud.html
And http://blogs.adobe.com/crawlspace/2014/06/2014-release-of-photoshop-cc-faq.html#plugins (scroll down to "Why don’t my 3rd Panels show up in the 2014 release of Photoshop CC? What happened to Oil Paint, Mini-Bridge & Kuler?”)
There is a new Kuler HTML5 panel available on Add Ons: http://adobe.ly/UgxQSN
If some extensions are not supported by PS CC 2014, you have to continue to use them in PS CC until their HTML based counterparts become available.