Make your Shoestrap theme use the Foundation framework instead of Bootstrap.
If you activate this plugin, your previous theme settings will be lost.
Keep a backup of your settings BEFORE enabling this plugin.
Install like a normal plugin and activate it.
Once you activate it, you will notice all the options in the Redux admin panel have changed. You will have to change a setting like for example the background color or the primary color to trigger the compiler and replace the previous stylesheet with the new one.