PRO: "Download type" required even if single choice

The form for adding a new downlad has several elements that I’d like to hide and set default values (presumably in the “Settings” of CMDM):

• Download type : by allowing only a specific type
• Preview : by forcing to yes
• Enable Media Player: by forcing to no
• Screenshots : by forcing to no

Since the form is not part of your frontend, I’ve set these as hidden elements. To do that, I had to edit lib/helpers/Form/Element/Hidden.php and lib/models/forms/AddDownloadForm.php

But that approach is doomed because my modifications will be lost on next update.

What can be done?

https://www.ads-software.com/plugins/cm-download-manager/