I had a problem exporting also. I was finishing up a pretty complex photo manipulation and I had forgotten to save the project prior to finishing it, and tried to export to jpeg. I the first dialogue box opened and I when I clicked export the dialogue box went away but no save options opened up (where you name the file you want to save as, as well as the location.) I tried to "save as" the entire document and the same thing happened: I couldn't choose location or name. I also tried to save it as a TIFF. No luck. I also tried to copy a flattened version of the photo into a new tab to save that. Still nothing. I eventually closed the program and opened it back up. I lost everything; I tried to open from clipboard but that option was grayed out so that whole project is lost and I'm not sure I want to go through the trouble of re doing it.