Hi, I'm using Joomla 4.2.9-1 and jD 4.0.20 jD version.
I changed the jD main directory to /jdownloads and 0755 permissions but I obtain this error when I active protection on that:
"Copy failed: [ROOT]/administrator/components/com_jdownloads/htaccess.txt to /jdownloads/.htaccess".

Hi,
in which case you may have made a mistake when changing the directory? The folder must be entered as an absolute path. Not only: /jdownloads

Copy failed: [ROOT]/administrator/components/com_jdownloads/htaccess.txt to /jdownloads/.htaccess".

I have it tested and it works as expected.

Since your post is not an bug report, I'm moving it.

Ok, probably I made a mistake. The problem I think was not to create a directory before changing path (it didn't exist), thinking about the process should be create it. At that point, original jdownloads directory was empty, due to this the process resulted impossible to execute.
You are right, it was not a bug. Sorry for this.