The installation notes say "Delphi 2007 for Win32 (Update 3). Other than that, I am not sure how to find out what update I have since I can't find the release notes or other references to the version.

The help folder has the following:

Log File: C:\CodeGear\RAD Studio\5.0\Help\Doc\H2Reg_Log.txt
Date: 10/5/2007 5:00:59 PM
Operating System: Windows NT 6.0 (Build 6000) No Service Pack
SysLocale.DefaultLCID: 0x0409 (1033)
SysLocale.PriLangID: 0x0009 (9)
SysLocale.SubLangID: 0x0001 (1)
DecimalSeparator: .
-------------------------------------------------------------------------------
EXE Path = C:\CodeGear\RAD Studio\5.0\Help\Doc\H2Reg.exe
EXE Version = 1.6.0.0
Cmdline Param(s) = -r | cmdfile=C:\CodeGear\RAD Studio\5.0\Help\Doc\h2reg.ini
Actual CmdLine = "C:\CodeGear\RAD Studio\5.0\Help\Doc\H2Reg.exe" -r cmdfile="C:\CodeGear\RAD Studio\5.0\Help\Doc\h2reg.ini"
_RunDir = C:\CodeGear\RAD Studio\5.0\Help\Doc
_ModuleName = H2Reg.exe
_ModuleDir = C:\CodeGear\RAD Studio\5.0\Help\Doc
_ModulePath = C:\CodeGear\RAD Studio\5.0\Help\Doc\H2Reg.exe
Module Version = 1.6.0.0
-------------------------------------------------------------------------------
_hhInstalled = YES
_hhVerStr = 6.0.6000.16386
_hhFriendlyVerStr = > 1.4a
-------------------------------------------------------------------------------
_ieInstalled = YES
_ieVerStr = 6.0.6000.16386
_ieFriendlyVerStr = Internet Explorer 6 (Windows Server 2003)