Directory Structure

You should have the following dirs within your "Gamebase\GBPlayer folder" :-

Here's a bit more info :- Note - the database names within this folder MUST match with the names inside your gamebase folder. Eg, if you have renamed your GBST v3.1d (and GBST v3.1d.mdb) with the Gamebase dir, to "Atari ST" - then you'll need to make the same rename within the GBPlayer folder as well. See the bold note above - about the cfg's needing the same database name prefix!