Reinstalling TDecisionGraph after installing QuickReport

I installed an update of QuickReport for Delphi 4. After the
installation the Teechart-components and the TDecisionGrid were
deinstalled.
Reinstalling Teechart was no problem, but now I don't know how to
reinstall the TDecisionGrid.
When I try to install DCLDSS40.BPL there occurs an error: The unit
"ArrowCha" is used by Tee44.