After installing SEO Studio on Windows 7 and Vista I get an error the DHTMLED control is not registered properly

Windows Vista and Windows 7 does not include the dhtmled.ocx that is used by SEO Studio and the applications that use this control should be migrated to use a new HTML editing component. 
You can read more about it here: 
http://msdn2.microsoft.com/en-us/library/aa663363.aspx 

Meanwhile, to get SEO Studio working on Vista and Windows 7 please download the new Vista compatible DHTMLED control from here: 
http://download.microsoft.com/download/6/f/9/6f92d5c3-ef1c-496f-b066-0698280ed4f1/DhtmlEd.msi

If after rebooting your PC the same error occurs when you start SEO Studio please copy the files from this location:

C:\Program Files\Common Files\microsoft shared\DhtmlEd  

to the location below. If the Triedit folder doesn’t exist please create it.

C:\Program Files\Common Files\microsoft shared\Triedit\DHTMLEd.ocx
C:\Program Files\Common Files\microsoft shared\Triedit\TriEdit.dll