Downloaded the zip file but cannot access them. Unzip generates errors:

Extracting to "C:\Users\xxxxx\Documents\DidIT Full Trial Version\"
Use Path: yes   Overlay Files: no
Extracting ExchangeCdo.EXE
Extracting VFPODBC.msi
Extracting DidIT.exe
Central and local directory mismatch for file "DidIT.exe" (crc-32 - local: 61A1E193 hex  central: E478460E hex).
Extracting upd-5_1_1_8232-ps_winxp-vista-x64.exe
Unable to find the local header for upd-5_1_1_8232-ps_winxp-vista-x64.exe.
Extracting Vista DhtmlEd.msi
Unable to find the local header for Vista DhtmlEd.msi.
Extracting Security_outlook.zip
Unable to find the local header for Security_outlook.zip.
Extracting Redemption\Customize.exe
Unable to find the local header for Redemption\Customize.exe.
Extracting Redemption\Install.exe
Unable to find the local header for Redemption\Install.exe.
Extracting Redemption\ProfMan.dll
Unable to find the local header for Redemption\ProfMan.dll.
Extracting Redemption\ProfMan64.dll
Unable to find the local header for Redemption\ProfMan64.dll.
Extracting Redemption\readme.txt
Unable to find the local header for Redemption\readme.txt.
Extracting Redemption\Redemption.dll
Unable to find the local header for Redemption\Redemption.dll.
Extracting Redemption\Redemption64.dll
Unable to find the local header for Redemption\Redemption64.dll.
Extracting DI_.EXE
Unable to find the local header for DI_.EXE.
Severe Error: Local and central CRC values don't match.

Up to date Unzip software used. Can anyone shed any light on this please?