installing a screensaver in KDE

[JASON JESSO]

Got my hands on the matrix screensaver.

I put KMatrix.desktop in
/usr/share/applnk/System/ScreenSavers.

Control center does not pick it up until I create the
link in
/usr/share/applnk-mdk-simplified/.hidden/ScreenSavers

In works than, but later on (few days later the link
dissappears).  All those links there get recreated. 
By what process?

How do I make this permanant?

I keep having to recreate this link manually.

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