I am wanting to put this on another computer that I just got. The new pc runs on Windows XP. I saved the install file to my flash drive, and installed it on the new computer. The new computer is not on the internet all the time and is used for scanner control only. The installation went well. HOWEVER, when i went to enter the registration key that i have saved, nothing happens. I tried restarting the program and it still says "DEMO MODE". I have re-entered the keys several times and still get the same results. Do I need to purchase another license or am I doing something wrong?