Don't waste your money.
If you wanna get into game design again, I'd suggest you try out Unity or Unreal Engine, depending on your skill set, they are free, state of the art and actively maintained.

If, for some reason, you really want to use Acknex - do the same as above, as there's no money involved from your side you can still keep an eye on Acknex and if the miracly occurs and there's indeed an update, you can still invest.
But right now is really the worst time to put your money into Acknex.