I get an error when trying to install the extension. I enter the serial number, username and password. Then, I get the following message:

ERROR INCOMPLETE INSTALLATION!!!
Cannot find the complementary installation file: file:///C|/Program Files (x86)/Adobe/Adobe Dreamweaver CC/Configuration/temp/sipp20/sipp20_install.xml

Hello Andre check this forum post:
www.dmxzone.com/support/15527/topic/59083/?page=2