To reinstall the Independence Sampler and its Content Library, follow these steps:
If the program is already installed on your computer, you will be given the option to either "Modify" or "Remove" the installation.
The dialog that follows gives you the option of selecting or deselecting additional programs for installation. Select Independence.
Click "Continue" to start the installation.
The plug-in dll's required for Independence (Independence.dll, Independence FX.dll und Independence.Content.exe) should now be located under the following paths:
C:\Program Files (x86)\VstPlugins\MAGIX\Independence\VSTPlugin32\
In Samplitude, check under "VSTi" > "Magix Synths" to see if "Independence Sampler" is there. Open it using the "simple" configuration.
Normally, you'll be asked at this point to insert the content DVDs or to download the content from the internet.
If this does not happen, navigate to C:\Program Files\VstPlugins\MAGIX\Independence\VSTPlugin64\ and run "Independence.Content.exe".