Reckon 2013 installer

Hi, I am a tech that has a client that has continued licensed version of Reckon, however has an old device that needs to be recovered where HDD failed and forgotten admin password, we have installers for newer versions however cannot open reckon data file as it states it needs to be upgraded. What is the easiest way to get a copy of installer for Reckon Accounts 2013? This is what it is called in Program Files... Thank you