How to retrieve the program icons back

Hello every one,

I have a little problem that I would appreciate an assistance on.I recently uninstalled one of my programs and reinstalled an older version which I thought was impressive.  The only problem is that after a successful installation of the older version, some of my program disappeared mysteriously from the system.

I have done research on the matter and I am not impressed by the option of having to clean the whole of the system given that I don’t have any system Restore points. Who may have an additional knowledge on how to retrieve the program icons back?

Please I would be glad to share knowledge.

This is one of the icons being converted to codes

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