all you have to do is locate the afxwin.h file located in your Visual Studio install location e.g.
c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\atlmfc\include\afxwin.h
Now this file is write-protected. Make a copy of the file as backup. Right mouse click on the original file and deselect 'read-only' under attributes. modify the file i.e. search for "#define _AFX_MRU_COUNT 4" and modify to e.g. 8. Save the file. Found it easier to do this in notepad++. Set the file attribute to 'read-only' again.
if your already in the GameGuru IDE solution, you should be asked if you want to replace current files that have been modified, whether you want to bring them back into the editor. Select yes to all. Clean the solution and then rebuild the IDE solution.
Run GameGuru and load in over 4 maps etc and you should see the recent files extend to above 4 and over in this case up to 8.
see pic below as example, here I have loaded in 7 map files which are displayed as recent files.
Just ensure you make backup copies of any original VS related files (or any file) if they need modifying. If something messes up you have the original to go back to.
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