i've been using version 8, and the new terragen2, i've never tried version 9. terragen 2 is too slow on my computer, version 8 works great. my question is, if i register version 8, would i be better off registering and using v9 instead of v8? can i still register v8, or is it too old? also, is there a big diff between 8 and 9? thanks