What computer operating system are you going from and to?
Assuming that the downloaded purchased installation files are compatible with the new computer's operating system, then you have a few choices
a. If original purchase download from Adobe, download a new set of installation file from Search "My Orders" and then your specific order at Adobe http://www.adobe.com
b. Download and install the tryout files from the following and insert your purchased serial number in them during installation.
Read and carry out carefully web page's instruction to avoid Access Denied Message
c. Use the Adobe document link Other downloads
d. Transfer your saved 12 downloaded installation files from old computer to new computer for installation
Please let us know what worked for you. Any questions, please do not hesitate to ask.