I have Premier Elements 9.0. When I start PRE and try to open a saved project, all I get is an empty window. The only way I can open an existing project is to first start a new one, then open the existing one from the File menu.
I don't know if it's connected, but I am also having a problem with installing an update that appears in Adobe Update manager. It downloads and then reports that it failed.
I followed some of the related discussions and think I've found the solution to both problems, switch off McAffee's firewall for PRE.
Great job of resolving your Premiere Elements 9 project opening issue.
McAfee can be particularly problematic for Premiere Elements, controlling both the antivirus and firewall(s).
As a just in case note, are you working from the 9.0.1 Update of version 9. If not, good idea to do so. But, if you do, please
use the online link from Adobe rather than the 9's opened project's Help Menu/Update.