Can someone help with the trouble with my Project64 Nintendo 64 emulator?

I downloaded Project64 on my personal computer and it works just fine. The problem now is that when I put it on a flashdrive to transfer it to an older computer, perhaps not as gamer friendly, it pops up error messages about the plugins; something about them either being missing or corrupt or something of that nature. PJ64 came with all of the various graphics plugins (Jabo_Direct3D8) and works fine on my computer but not on this older one that I want it to run on as well. Is there any way to adjust the actual computer (which I don't really want to do) or the program in some way (would prefer highly) to make PJ64 work on an older computer?