Hi Ian,
If you're re-install Codewarrior it will not have the required changes to use USBDM.
In any case, support for CW V10.5 was only added in USBDM V4.10.6c.
Please uninstall and re-install the latest USBDM version from Sourceforge:
USBDM - Browse /Version 4.10.6/Software at SourceForge.net
bye
PS. The patch files will NOT work with that version. The patch menu items are created when USBDM is installed and 'remember' the installation situation. They can only be used to restore USBDM functionality if the existing installation in Codewarrior is broken e.g. by a Codewarrior fixpack.