AD6.6 showing some problem in opening project file.

[sandy]

Hi Board;
I have reinstalled my AD6.6 ,due to some reasons . When I click on my  "PRJPCB" file It opens and returns me a blank work space windowas shown below. Though I am able to open my project from file>open command , but not directly by clicking the project file .I have tried to google it but couldnt  find anything usefull , can some one help me with the issue/setting.