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[kde] Change icon for file type

Is it possible to apply changes without relogin?

In file context menu Properties -> File Type Options I click on icon. Icon selection dialog opens. I select icon -- in Edit File type it changes to new icon. Then I click OK and in Properties there is still old icon! What I found useful is to delete /var/tmp/kdecache-$USER/icon-cache.kcache and then relogin. Is it possible to see changes without these actions?
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