Delphi 7 crashes after installing Delphi XE (BPL mixed paths)

After installing Delphi XE, my good-old Delphi 7 started to crash more often. Today, I have discovered that one of my BPLs was still loaded by D7 even if I deleted it from "c:\Program Files\Borland\Delphi7\Projects\Bpl". After I have searched the entire disk I have discovered a copy of that BPL in "c:\Users\Public\Documents\RAD Studio\8.0\Bpl".

My question is: why is Delphi 7 looking in "c:\Users\Public\Documents\RAD Studio\8.0\Bpl"? How can I convince it to look only in "c:\Program Files\Borland\Delphi7\Projects\Bpl" ?