Project Assets folder not opening

Hello everyone. I have recently experienced an issue on a project and have not been able to fix it. The project assets folder is not opening when I add media or want to select a particular file. I have followed some other threads trying to answer this question but their solutions did not work for me. I tried to remove the Adobe Premiere Elements Prefs files but it only worked temporarily for the very next new project that I opened, the project assets folder will open. However, it will not work on older projects or any subsequent projects after that first new project is started. I am running Adobe Premiere Elements 12 on a Windows 10 OS. Any help would be greatly appreciated.