Explanation: You have to run the Foxhound "unsetup" process before reinstalling Foxhound, or before installing a new version.

If you forget, you will see this error when you run the Foxhound setup; this is a limitation of the way the InstallShield setup for Foxhound is constructed:

There are three ways to run the Foxhound unsetup process:

• Click on start - All Programs - Foxhound4 - Tools - Unsetup Foxhound, or

• use the Control Panel - Add or Remove Programs dialog to remove Foxhound Version 4, or

• run this command: MsiExec.exe /X{08A52B52-C7AF-424B-9A9E-4A010F0D304A}

Here's what you see when you click on start - All Programs - Foxhound4 - Tools - Unsetup Foxhound:

See also...
How do I install Foxhound?
How do I install a new version of Foxhound?
How do I reinstall Foxhound?
Why is it called "unsetup" instead of "uninstall"?
How do I remove Foxhound from my system?