Trouble with on file right-click menu

I install and try Directory Opus 8.0.0 ANSI
It look good and I download and install Directory Opus 8.2.1 Unicode above 8.0.0 ANSI version. Now at right-click on some files (.doc; .xls) contex menu show me some duplicate itmes (Open, Open read only, Edit) 2 times. I uninstall Directory Opus and install again but have same result. How can I remove duplicate items in context menu?

Please see my reply in this thread:

[Image Viewer and strange problem?)

I've replied in there and locked this thread so that all the information stays in one place.