I imported my project from evo v8 to evo v9 and after that exported it to other folder in .iwzip to have backup. When I import this new file to v9  everything is work correctly (preview is ok with all photos). When I  change 1 parameter (menu on the top instead of on the left) and click preview my project opens without photos. Where is the reason? When I created backup in v8 project file and all neccesary files were placed in pointed folder. Now it looks quite different.