Just Open Origin in your Libary Click on the Game then Settings>Game Properties
Go to Advanced Launch Options and in the Command Line Write down the location of your Frosty Mod Manager.
Like this:
D:\Random\Frosty_Mod_Manager
That's it.
Ohh also, launch the game using Origin or Steam.
Sometimes I have to click on "Play/Start" like 3-4 times, just to get it to launch... But it works.
I've found this method on EA Forums.