Extension updates are ready for installation on DW CC 2015
Some users are still having issues getting the extensions to install because of bugs in the Adobe extension manager. Here are some tips that others have used to get around these issues:
1) Sometimes completely uninstalling and reinstalling both Dreamweaver and the Extension Manager causes it to start working.
if extension manager did not show dw cc 2015, just delete ExMan.db. location is:
/Library/Application Support/Adobe/Extension Manager CC/Configuration/DB/
C:\ProgramData\Adobe\Extenson Manager CC\Configuration\DB\
3) Some users have reported more success using the DMXZone extension manager:
4) You can also install extensions directly through the command line without using an extension manager: https://helpx.adobe.com/x-productkb/global/installingextensionsandaddons.html