USE THIS METHOD AS A LAST RESORT!!!
You should now be able to install the newer version of daemon tools.
- Click start, run, type regedit, [enter]
- Browse to HKEY_CLASSES_ROOT\Installer\Products
- Go through each key and look at ProductName
- When you find DAEMON TOOLS, copy the key name (should be something like B3D974E578A49B249AE1E22B82A4454D).
- Export then delete this key (click File menu)
- Browse to HKEY_CLASSES_ROOT\Installer\UpgradeCodes
- Go through each key until you find the key from step 4 in the right pane.
- Export then delete this key
You should now be able to install the newer version of daemon tools.