Thank you very much for your help. Yes, I noticed a small problem now with the page: https://www.dukemaps.net/?page_id=38
It appears those files can’t be downloaded now. Perhaps this has to do with the next update. I really appreciate your help and when this gets fixed so that it is working properly I would like to make a donation or contribution to your software. Please let me know the best way I can do this.
I think what I am struggling with is getting it to work properly on a POST page then also properly in a Tablepress Row. It appears there are some problems with the download links within tablepress plugin. This is why I had to Disable certain functions of the Download Manager Plugin. Particularly Bootstrap CSS needs to be disabled to see the download button within a Tablepress cell as shown in the Link mentioned above.
*** UPDATE ***
I have since gone back into my WordPress to disable Bootstrap CSS so that my downloads will be available in a Tablepress row. I noticed this was unchecked due to your changes. But it prevents people from downloading files if left unchecked.
Thanks,
Paul