The GTBS redefine a lot of classes ... so many other scripts are not compatible with it .
For exemple , bulletXt's swap tileset script does not work ... For this one , i know how to fix : in the swap tileset script , check the class "Spriteset_Map" and duplicate it with the name "Spriteset_Battle_GTBS" .
1.4 is the last version . If you have the demo , you can check that you have all the scripts and pictures . But i think this is a compatibility issue .