In Photoshop CS5 I can open the drop-down menu and select 'save' or 'save as' but then the respective window won't open. If I use either keyboard shortcut nothing happens. The only way to save anything is to close either the file or the whole program and wait till I'm ask whether I want to save before closing. With new files I then get the 'save as' window, with existing files it just saves without giving me any options. This means that I can't save an existing file in a different format or as a new file. Is there any solution for this?