One of the new features of OS X 10.8 Mountain Lion is the GateKeeper which gives the user more control when installing new apps in their system.
Most applications, especially those downloaded from third party source will be getting a pop-up warning message unless you're downloading from the App Store.
This is an example of the pop-up message that you will be getting:
To fix this, perform the following steps:
1.) Click on the Apple logo and go to System preferences:
2.) Then click on Security and Privacy:
3.) From the General Tab, Click on the lock icon and enter your password to unlock it:
4.) Under "Allow applications downloaded from", Select Anywhere:
5.) That's it, you may now run the Time Doctor installer.
To learn more about this issue, you can check Apple's knowledge base on Gatekeeper.
For questions, comments or feedback regarding this topic, please send an email to firstname.lastname@example.org.