Install Location? Windows Version?

[semicodin]

Is LightGallery Desktop compatible with Windows XP? If not, skip the rest of my post. If so . . .

Why can't I place LightGallery on-a-drive/in-a-directory of my choosing? I had to hunt down where it installed (In Windows Program Files folder) and manually move it to the Drive + Folder I intend to use it in, but I get a "not a valid Win32 application" error when I attempt to launch the program.