Several Sparky Apps suddenly disappear - what is that

[Sparkyphone]

Hello,
I'm writing this, because several apps suddenly disappeared from the menu, and I have no idea, why this happened and if they are gone completely or only from the menu:
The first one was Aptus - the Sparky installation tool, gone a few months ago, okay there is Synaptic
The second one was Atril, the pdf-Viewer, I reinstalled it with Synaptic
Today I found out, simple scan is no more there, I mean in the menu
What is that ?
As I do not know what is the exact name of these apps, I cannot try to start them from the terminal
Does anybody have an idea ?
greets,
Armin

Supplement:
Together with Aptus, the update(called "upgrade")-app disappeared also. Before the update-app was displayed sometimes two times a day, or at least every three days, now nothing happenes (or perhaps I do not see it).

[AxL]

[....]
because several apps suddenly disappeared from the menu, and I have no idea, why this happened and if they are gone completely or only from the menu ...

 Well, it seems like the first question is obvious. Which desktop (KDE, LXQt, Mate, Xfce)
 or window manager (Openbox, Fluxbox ... etc) are you using?   





Cheers !!