Mea Culpa. I should have been a bit more specific. I purchased the program as a download from the website. I can't seem to find any way to reinstall what I've already paid for. Disc would do me no good, no optical drive on the machine.
In that case you use the download to install the same way as you did the first time... or are you saying that you did not keep a copy of the download on an external device (usb flash drive or external hard drive) and you no longer have your download?
Adobe has removed ALL public download links for serial number programs -links are ONLY available to someone who purchased a download from Adobe . For serial number programs you may download ONLY if you bought direct from Adobe via download -Log-in to your account and click this link https://account.adobe.com/products --click Order history on the left and then the link to your order that will show on the right --and finally click the link "Downloads and serial numbers" that will appear ---as always, write the serial number in a text file AND copy that text file and the ---download file(s) to an external drive (or two) to be sure you have what you need -if you did not buy direct from Adobe via download you must find your original install -if you have an Education or volume license you MUST use your original media --the link for an Education or volume license download is not available at all -if you bought a disc and don't have a drive you will need to buy an external USB drive -if you bought and lost a disc Adobe does not provide a replacement via download -if you bought a download from a 3rd party vendor you will need to contact that vendor . When you do have a download, be sure to copy it to at least one external device -a usb flash drive or hard drive, or write to a DVD -plus a text file containing your serial number