I need this program for my work and I installed it with gdebi. I can see the icon but I can't get it to start. The icon goes up and down when I click on it but nothing opens. How can I get it to work? What should I provide you with?
I was able to replicate your issue. I am able to start the program from the command line:
mono /usr/share/ssm/Screenshot\ Monitor.exe
This will work as well:
mono '/usr/share/ssm/Screenshot Monitor.exe'
A Log In window appeared.
But I'm not sure why it won't start by clicking on the icon.
I installed it in Ubuntu and it works just fine. You can launch it from the icon. I didn't notice any differences in the respective .desktop files in Ubuntu and elementary OS.
Regarding the message
"Gtk-Message: Failed to load module "pantheon-filechooser-module":
There is an answer to that here: Gtk-Message: Failed to load module "pantheon-filechooser-module"