https://helpx.adobe.com/dreamweaver/kb/known-issues-dreamweaver-cc-2017.html
Extension installation issues in non-American-English versions:
https://helpx.adobe.com/dreamweaver/kb/unable-to-install-dreamweaver-in-non-english-locales.html
The people have spoken and Dreamweaver CC 2017 is the most criticized version of Dreamweaver in many, many years. If you've pulled the trigger on an upgrade, and would like to revert to a previous version, here's how...
http://blogs.adobe.com/adobecare/2015/06/16/how-to-find-and-install-previous-version-of-adobe-apps-in-cc-2015/