The intent is not to cast blame. But, it is too easy to blame the
distribution or the application without investigating. That is usually the
first thing and bug reports get posted for something that is not a bug.
Developers are busy enough with chasing phantoms. I sympathise with ordinary
users who do not know where to turn to when strange things happen. But we
should not jump to conclusions that individual problems are widespread and
that applications are buggy, just because one or two people encounter
something they can't resolve.

I would do as Corisa has done and re-install the application first. However,
I would first clean the cache so I am not installing something that is
already on the computer than may be faulty. It is just ruling out variables.

sudo apt-get clean

If that does not resolve it then I would go to the settings and remove them.
Go to nautilus and delete folders relating to that application. It will
generate new ones. Back up the old one first by renaming it.

This is just trail and error since we don't know the nature of the problem.