Blank pages in design view

Had to reinstall Wappler. Starts fine now. Default demo pages (Real estate dynamic and static pages) looks good. BUT when i try to open ANY page I had previously created, all I get is a blank white page in design view. In code view, all the code is there. In split view, same story. Can see the code but the markup is blank. Uninstalled and reinstalled and it had no effect. Thank you for your help.