Created attachment 105157 [details]
Image showing the wrong dialog.

This is a simple bug that comes from running Kdenlive on GNOME and not on Plasma.

Steps to reproduce the bug:
1. On a GNOME Shell session, click the "render" button or go to "Project - Render" in the menu bar. The render options dialog opens.

2. Click the folder button next to "output destination" to attempt to change the output destination.

Expected Result:
A "save file" dialog should appear.

Actual result:
An "open file" dialog appears and picking a file destination is not possible.

Is Kdenlive using Zenity for the GNOME file dialogs? If so we could fix this just by adding '--save' as a parameter for the window opened by the "Output Destination" button. If not, I do not expect it should be too hard to fix, since it's only some sort of shell/front-end/toolkit calling the wrong dialog for GNOME.