HI Al, HI dom now I got it! I found the problem The problem is that PTE5 (and the exe created with it) don't recognize the monitor profile .icc that I created with Spyder2espress (Colorvision) on my PC and apply the default monitor settings (too many brightness ...)!!! In fact, I created two presentation with the same images (one with 4.48 and one with 5) and when I look over them on an other PC (not profiled) there's not differences ... Now I know the problem, but I don'have any ideas for the solution ... My only hope is to wait a new version? It's possible to contact the developers? Ciao, ciao from Italy and sorry for my english ...