Hello, Richard!
Your issue is not linked with a problem of BaronSoftware.
The ‘TsPopupInfoBox’ type is declared in the sComboBoxes.pas unit.
Please, check this unit is such type exists there.
And be sure that old sComboBoxes unit (v15) does not used by Delphi in compiling.
If you have this issue still I can connect to your PC and solve it remotely if you wish.
I think, an old unit used there.
PS. Or, maybe an old runtime acnt*_R.Bpl package used by Delphi.