The good news! I have my old computer back, and even have all of my games and creations on my external hard drive! This means I can at long last get back to work again.
The bad news... for some reason, RMXP isn't running properly. I had to redownload it onto my computer, and installed it successfully, but when I try to activate it beyond a 30-day trial, it won't work. It doesn't respond when I click the Buy Now button, and if I try to enter in an activation code, it will freeze up and not do anything. I can use it on the free trial perfectly, but for some reason it just won't let me unlock the full program. Any ideas on what I can do about this?