When you buy a program (game), the license conditions stipulate how many times you can install it (how many installations can be live at a given time). So look at the license terms. ;-) But I personally estimate that you bought one license - so you can only install it on one computer (then, if necessary, uninstall and install on another - of course, you can also). I add: It will probably be fine as you write - but you will find out for sure when you read the license conditions. ;-)