Frequently Asked Question
Does it say it prevented an unrecognized app from starting?
This is expected for a while after a program has just been published. New files are not automatically trusted by SmartScreen (I didn't pay for that level of code signing certificate) -- they'll be trusted according to how they see people using the file. You choosing to install it anyway helps it, for instance.
More information here:
How to install it anyway:
Click "More info" link
Check that the publisher is KarenWare.com -- this is important. If you've downloaded the installer from somewhere else and it doesn't say KarenWare.com then that's your first indication we didn't build the file.
So, if all looks good then click "Run anyway"