I'm glad that that's settled. For more info (and another option), see
How to bypass Gatekeeper in OS X Mavericks and
How to Open Third-Party Apps from Unidentified Developers. The second article is a bit clearer.
The relevant part says:
If you regularly use third-party programs that give this warning, then one option is to turn off Gatekeeper in the Security System Preferences, but this will prevent the service from helping secure your Mac.
To overcome this, there are two options. The first is to right-click the program and use the "Open" contextual menu item to initially launch such programs. The use of this menu suggests you explicitly intend to open the program, instead of perhaps inadvertently launching it with a double-click. When you do this, a warning message will still appear; however, if you choose the option to open the program, then a Gatekeeper exception will be made for it.I haven't tried this myself but it's worth noting.