It looks like you installed Poser to a new location and did not choose the original location where your previous Poser was installed. So DSON and EZSkin and other 3rd party scripts are no longer installed. You can copy them over from your previous installation in Program Files which is located at Program Files:Smith Micro:Poser 11. In that folder copy the runtime:python:addons folder to the same location in the new poser install folder (Program FIles:Poser Software:Poser 11

You also need to copy the 3rd party scripts to the new poser folder.

Alternatively and maybe the best choice is to do a new install of Poser but now choose the old Poser location and choose not to uninstall and then follow the install steps using keep preferences. That will bring you back to the old situation but with the updated Poser.