with DO 12.22 (and just updated to .24): Suddenly my context menu commands show an "Unkown error" (translated) dialog. Tried it additionally with .md extension and Windows Editor:
Action: Edit File Editor
Type: Run an application
Application: "%windir%\system32\notepad.exe" %1
my problem is much more complex, that was just an example for testing. The reason of my problem is some kind of corrupt file extension. I want to delete that extension completly, but want to save my settings before. Where are the "Application" settings saved? Looked in the corresponding *.oxr-file in folder FileTypes without success. And when I copy something in the File Type dialog the clipboard contains binary data, right? Not XML like e. g. buttons?
Everything Opus-specific is under /dopusdata/FileTypes, which it sounds like you've already found.
The rest is normal Windows registry filetype data, and not specific to Opus.
Updating Opus would not corrupt a filetype. Do you still think the problem was caused by the update? It sounds like things have changed a bit since the first post.