Loading game

Alright, so I downloaded the game, started to play, and saved the file. I have the .rxdata file saved on my computer. I'm not sure what program will load that file. The only way I can get the game open again is to go through installer program again, and when I do, the option to open my saved file doesn't exist. I feel like there should be a program that I can open right away and go right into the game and be able to load my save file from there. Suggestions?