Have you looked in Pronterface Settings??
There are several entries there relating to Slic3r, in particular there is an entry called 'sliceconfig' which points to the profile that your installation of slic3r is using. By default, on Windows, slic3r uses the hidden directory c:\Users\{user}\AppData\Roaming\Slic3r for this (note that in in the sliceconfig parameter you have to use FOREWARD slashes (i.e. '/' not the windows convention of BACKWARD ones (i.e. '\')).
Hope this goves you a clue.
Harvey
There are several entries there relating to Slic3r, in particular there is an entry called 'sliceconfig' which points to the profile that your installation of slic3r is using. By default, on Windows, slic3r uses the hidden directory c:\Users\{user}\AppData\Roaming\Slic3r for this (note that in in the sliceconfig parameter you have to use FOREWARD slashes (i.e. '/' not the windows convention of BACKWARD ones (i.e. '\')).
Hope this goves you a clue.
Harvey