They are needed for a publishing project. Lo-res versions have been agreed with client and now I need to download hi-res tiffs. When I log in to get these, nearly all the final images have disappeared from the projects. Only two or three remain in the immediately visible workspace. Some pngs available from history but no hi-res tiff option and not all the images seem to be there, either. I've tried logging out and logging in. Using Firefox on W10.