Big problem with Searchlight Simulations

For some time now the GE AC4400CW, SD40-2 BN and BNSF locomotives from SearchlightSimulations have not been working on my computer.
All other SS products work fine except these. Curiously the Key, Log and Serial files seem to be the crux of the problem.
Roughly I paid around 80$ for these locomotives and I end up with nothing. I tried to contact them without success, no answer from them.
I don't need to tell you that I'm furious with SS who doesn't seem to care about their customers. I assure you that I will not buy anything from them again unless they come to my aid quickly.
Am I the only SS customer who has this problem? The dern Key, Log or Serial are in my opinion an irritant that could be done without when buying any product.
If anyone has a solution please let me know.
All other SS products work fine except these. Curiously the Key, Log and Serial files seem to be the crux of the problem.
Roughly I paid around 80$ for these locomotives and I end up with nothing. I tried to contact them without success, no answer from them.
I don't need to tell you that I'm furious with SS who doesn't seem to care about their customers. I assure you that I will not buy anything from them again unless they come to my aid quickly.
Am I the only SS customer who has this problem? The dern Key, Log or Serial are in my opinion an irritant that could be done without when buying any product.
If anyone has a solution please let me know.