I'm not really sure what you mean with "...I tried to load the picon..".
If you mean you cannot start by click on the desktop shortcut - please check if link to the application within the shortcut is showing the right path. Otherwise, try to open DCC directly in the application folder. If it works, create a new shortcut on the desktop by yourself. If not, is there an error message or something else?
The configuration of the installed version is stored in "CURRENT_USER"\DCC_E2. Maybe, there is something wrong.