BFBuilderPro Error

[Fire]

I installed BFBuilderpro and put it in the BFBuilder file , i dont have to replace anything or put it anywhere special do i? and another thing when i try to open a file it says error on script and some more things , and when i press yes nothing happens and when i press no it either keeps coming up or it loads the file but when i click on anything after that nothing works. HelP?