18.04 .desktop unstrusted application launcher

[namnamisback]

Hello,

I have multiple .desktop to set up on 80 computers
Since ubuntu 18.04 the .desktop tells me "Untrusted Application Launcher" & asks what I want to do.

Does anyone know a way to apply the "mark as trusted"? Does it add the file in a trusted list somewhere?
Anyone have idea how it works now in 18.04

Thx for help

[halogen2]

Does running this command in Terminal help? -

chmod +x <yourfile.desktop>

replacing <yourfile.desktop> with the actual path to your .desktop file

[namnamisback]

This does not work anymore since 18.04
Even when the application is executable it still asks about trustable application

[islandBilly]

What I discovered is that you can right-click the desktop launcher, and then mark it as executable. Then it works as trusted.

[rsbrux]

What I discovered is that you can right-click the desktop launcher, and then mark it as executable. Then it works as trusted.

When I right-click the desktop launcher in Ubuntu Studio 18.04, I get a pop-up menu, with no option to mark it as executable. If I click on "Properties" in the pop-up menu, I get a dialog with a tab labeled "Permissions" which includes an "execute" checkbox (see https://askubuntu.com/a/10427/159517). However, this checkbox is greyed out and cannot be activated. How can I make my desktop launchers work?