Searching would bring you many results as your question has been answered many times. That's probably why nobody has answered. Here's what to do:
1. Download and install the latest Desktop Manager from here
2. Download and install to your PC the OS package that matches what is on your BB. Look in >Options >About for the version number then go to your carrier's website and download the corresponding OS. Links can be found here
3. Connect your BB and open Desktop Manager.
4. Go to Application Loader. You should see checkboxes for your apps in the OS. Check what you want and uncheck what you don't want. Then finish the installation.