Downloading older version that was paid for in 2014

[samyounger552003]

In 2014 i purchased Adobe Acrobat Pro Version 11.0, I am wondering how to downlaod this old purchaed software that i paid 451 dollars for that i thought was good and didnt need a lot of changes.  I have been away from my business since december of 2014 but and starting back up again.  wHEN I DOWNLOAD Acrobat Pro and entered my serial number it says serial number not valid, how do I use this software and download the correct version, etc.    

[gkaiseril]

Install archive

You should also check that Acrobat X is compatible with your OS and applications.