Whenever I use the program, a prompt pops up soon with pre-filled SN.
The prompt says "Please enter a SN now to continue using the product."
I clicked "Next>" button as the SN has already been pre-filled and encounter a second issue.
"The SN that you entered indicates that your setup is for an upgrade version of Adobe Acrobat Pro. To be eligible for this upgrade, you must own a qualifying product.
Select a product that you own and key in the serial number"
I lost my DVD case which was probably for Adobe Creative Suite 5.5 as it was 13 years ago and I don't have the SN anymore. I don't want to upgrade. I just want to use it Adobe Acrobat Pro as it is. Please help.