Download an Earlier Version of TestComplete

Hello, So i am looking to download a couple of specific versions of TestComplete, specifcally 15.71 and 15.72 for the purpose of looking into an issue I am encountering. However I cannot seem to be able to find a place where i can get the installers for these, or any other previous versions. I was wondering if anyone had any idea if there was a library of previous installers that I could refer to for my testing.

This is in relation to another post of mine where Name Mapping stopped working within my TestComplete environment. After doing some backtracking and research, i believe it was between these two versions that it broke. I was looking to provide support with this information, though based on my searching through the forums other people have also created tickets for this and it was not ever resolved. But nonetheless i would like to make sure I'm doing my due diligence before just saying TestComplete broke its self.