Is there a way to set ForceLargerFonts registry setting for CR for .NET 4.0 for different versions of Crystal on same server?

Hello,

my company is running XI and 2011 in parallel using a .NET application.  For XI we do want Crystal to shrink fonts but for 2011 we do not. I'm able to fix 2011 by updating the registry setting  for  ForceLargerFonts under HKLM\Software\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Crystal Reports\Export\PDF. However, this affects both versions.  Is there a way to control this setting by Crystal version for .NET?

Thanks,

Odette