I have just installed GNOME FlashBack session on fresh Ubuntu 20.04 LTS.
Then I opened Applications menu and dragged by mouse some icon (Cheese in my case) from it to the desktop.
The dragged icon does not have real icon and was shown as simple text file. I double-clicked this icon, the text editor was surprisingly opened. Then I did right mouse click on this desktop file and made it executable. Even after this I can't launch this application by double-clicking the icon.
What am I doing wrong?