How do you play downloaded software?
I'm not sure what you mean by "Play." If you mean you want to open the program and run it, there are several ways to do this. (I also don't know what kind of equipment you have, in future questions please give your OS and your browser). On the chance that you are using Windows software, you may:
1. Go to start/programs and right click on the program or the exe file and choose "Open."
2. Go to start/run and type the name of the program in the box.
3. Go to start/search and type the name of the program or exe file in the box. When the program comes up, click twice on it.