How do I get rid of unusable application icon on launcher?

[Colin Law]

On Fri, 24 May 2019 at 04:09, Owen Thomas <owen.paul.thomas at gmail.com> wrote:
> ...
> I can right click on the icon displayed when I start the application from a CLI window. One of the options is to "Lock to Launcher"; I click on it so that when I close the application, the icon remains. After closing the application, I attempt to restart the application by clicking on the icon displayed in the launcher. The icon flashes for a bit, and then nothing happens.
>
> I want my application to start when I click on the launcher icon. It isn't. What is going wrong?

That sounds like a problem with the desktop launcher file for that
app.  It may be failing because it expects a terminal or expects a
particular working directory or something similar.  What is the app
and how did you install it?
I presume that other apps work ok from the launcher.

Colin