I have AC Toolkit on 3 computers, it works fine on those running XP. The third computer running Vista seems to have some compatibility problems with AC Toolkit. When editing a town, the "Apply" button on the bottom right is missing and the 4 buttons below the town map are missing as well. Thus changes can not be applied or saved. I've tried hiding the toolbar, not allowing it to stay on top, but the map just fills the screen and the buttons are still missing when the toolbar is not present. I've tried running the program in XP emulation mode to no avail. I don't know if this is a Vista problem or some type of video problem. I'm running it on a 24" wide screen monitor. It's frustrating, hope you can help.