well, i downloaded the trial version myself to see if i could see what the problem was. when i edited an image, it wrote a new file with _edited appended, as you said, and it seems to insist on using the edited version unless you tell it to revert to the original image and thereby discarding your edited version. it's strange that it doesn't allow you to have multiple versions of an image (unless you happen to change the file name and "get" it again. i think the idea of this program is that the edited file is supposed to be the final version and it just keeps the original around on file in case you want to remove the edits. of course, i'm sure the true purpose of this could be explained if i read the quick guide in the help, but i'm too lazy
this program does seem like a pretty neat way to organize your photos although my camera came with a program that is kinda similar to this too. it's disappointing that i don't even have control over how this album program saves files (formats, compression options, even something as simple as renaming the file). i know this is probably an attempt to make things easier for beginning users, but in this case it's just more confusing
sorry i couldn't be of more help. i think if you want to have more predictable control over your image editing you're better off with photoshop elements or something like that... it's not a great deal more complex and you'll have a lot more powerful tools anyway.
hai